Malicious PDF — malware analysis report

Static analysis result for SHA-256 920e98a0844f201b…

MALICIOUS

PDF

79.6 KB Created: 2021-09-05 05:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cbd0ed98658c1a2bead0ca5741682429 SHA-1: 65222006e67f417e9c82bc67848256d61235f269 SHA-256: 920e98a0844f201ba32acb67836f4d945b5f4c09699494d7aaccf13bcff5217d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a link farm designed to redirect users to malicious sites. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a strong intent to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=aid+and+authoritarianism+in+africa+pdf PDF link annotation
    • http://studiotecnicopinto.it/userfiles/files/xizafe.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/bozota.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/7ccfa1106ab16f4d770b04819064fa5e/fesalofasezijuxul.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/dederifematewenig.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1fe65c09f---xulotejofakixakowiva.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/jowom.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fce725aaf63---44557956407.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/639a7bf7ad303135716cf0d6ad834eee/devuzeno.pdfIn PDF document text
    • https://armenia4d.com/contents//files/tezam.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72fc97699e---xinulijotiz.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/7r2lkm95fp91g6qhk6umkgcag2/59375703000.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd01ebb429---96329628241.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/426c8b5f99ba8b0ccfff392e0a2f38be/weletapuselavatebo.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/27766504495.pdfIn PDF document text
    • http://chouchoudauphongongtay.com/upload/ck/files/tejeneveperozage.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091705179492---15547992964.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1487708381---kipibujugizejubedepideg.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44c6f869b2---najilular.pdfIn PDF document text
    • https://bdlvn.com/steel/upload/files/mijameza.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bf6556a54---ralobifolaputorivo.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/14275856055.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/85614514763.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/18/file/20210518_061915_186.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/12f3d5c7475b477b3fe99f0cb3459886/22366379052.pdfIn PDF document text
    • 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_off0000d335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD335 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 17128 bytes
SHA-256: 639b2bd7302595cddc3fa3bd6f9c5537561977a764a4db3b65b06dc75d2e18b1
font_02_sfnt_off00011763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11763 10788 bytes
SHA-256: 0cce4931cb403172a7230a6bb3e446ccf0e8008ea5ad3375e08c66db1df4dcc8

Open this report in the interactive analyzer, or submit your own file for analysis.