Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce1840cabcee2c7…

MALICIOUS

PDF

110.4 KB Created: 2021-08-21 12:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d3dde051506bea09edc29ab0e8bc4728 SHA-1: 94261359c634460a05f110f313b7c1dd2bbb23b3 SHA-256: 8ce1840cabcee2c79070ca7e679bf35264c2322ddeb357ecba9c8a2c44891930
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a brand-impersonation credential phishing lure, specifically impersonating Amazon. The document contains numerous links, many hosted on compromised CMS upload storage, directing users to potentially malicious sites. While no scripts were explicitly extracted, the nature of the links and the phishing lure suggest an attempt to trick users into revealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=safe+t+alert+35-742+manual.
  • 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 https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/65e53896e71887dcf35bc9d8398a1399/83082886924.pdf In PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/73768964796.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/47817699683.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715e99429d9---pikaraxorabekoridegoka.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/9krhrfo2528b7dnrer0uipkmd4/fozozaxafogimamolewim.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a09b8b233---1012989945.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/zitozevapimudebiwevod.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d3104babd---847733552.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db01364657---rulef.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/92105805763.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/29393193675.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/sewejafatipak.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdf4e35b15---51112708107.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c750d7a279d---lotafesovatulewerobavuve.pdfIn PDF document text
    • http://tano-cable.com/d/files/xazimonoxululuxuwig.pdfIn PDF document text
    • http://huimao.com/upload/69392869683.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/45211407638.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3bfbc03a71---xenaloxowez.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/nubumiposulexapelibarixev.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6eee3f5cb---41060201868.pdfIn PDF document text
    • http://agrion.org/upload/fichier/89034485845.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/4178299501.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/fitadimobajar.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/suveguwenulorabidotojit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=safe+t+alert+35-742+manualPDF 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_off0001498f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000161a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161A6 10760 bytes
SHA-256: e2903fb8640528a9285f0df2081b17e3ab9aefe2d16fa1c21c74de3be36f194e
font_02_sfnt_off00017a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A9B 18208 bytes
SHA-256: 5c542e8934ab71411a9ad5d23f26ab2f34181f0c9048260c378101b27f16a132

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