Malicious PDF — malware analysis report

Static analysis result for SHA-256 938582247c344e76…

MALICIOUS

PDF

85.7 KB Created: 2021-07-13 09:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a0a63fc60a0cce42acbce31d44f9fb0 SHA-1: be586143f0f34534d781282ab017d62c61112a19 SHA-256: 938582247c344e765c270082f4e634df69e0554ed3cfcffd0451af892a698a40
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Internal Spearphishing T1204.002 Malicious Link

This PDF document is classified as malicious and exhibits characteristics of a credential phishing attack, specifically targeting Microsoft credentials. It contains multiple links to disposable hosting sites and compromised CMS uploads, suggesting an attempt to lure users to malicious sites. The document body, though heavily obfuscated, likely contains further lures or redirects to facilitate the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+change+the+password+on+my+computer+windows+10.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609492065c89a---12588316708.pdf In PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/db254a5d4798240a8e41b5ea3aca3918/xigoworevesinaxojejod.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083812f3fd37---47062924482.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/kirodaditikewebidavovor.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d89fc352ea---ralulid.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/52065151985.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/pugetezudezotu.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/fojexipekitexuvuxujow.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/lobajibazififiku.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/powufejir.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/e949108cce119a53ab41b40e056f237b/gelagiwutafarexu.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/24942f70ac1eb059444c950a7b455932/jubuwafaruno.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/cf2a597964fad28fda84ebfe9317408a/vaposuvuzitixe.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b086601a940---gevibasidetaledotobutiko.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0a9b21782---dejaponu.pdfIn PDF document text
    • http://holtfamilyreunion.com/clients/5/51/517903a0238f10651a3d170edcbd2d86/File/ramidimur.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/637dac3c94cfecea8e8e70e2cd85138a/18757480110.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7424acf1f---binipalomurorigagugan.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b85d0d5ad---timomebapoxorofanisogifur.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/60155803408.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/6728329783.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ed28d27529486f04e2cd976bbfdf7209/xokepolifakorotixole.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/12462810279.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b4ad9b2ac---xakutuso.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e6942e891---juvasuvabo.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/87583158401.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+change+the+password+on+my+computer+windows+10PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 16664 bytes
SHA-256: b61839c16049f52f4918599adf21892b25ee5b6a1d1e07438e102942944e06b1
font_01_sfnt_off0001168b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168B 11380 bytes
SHA-256: 20a26e435ba1fb5d2707b12f8d3ed345fa778119cea4577b26d3ef68c9d56947
font_02_sfnt_off00013114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13114 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1