Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88fac49cabb481c…

MALICIOUS

PDF

100.0 KB Created: 2021-02-28 03:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8057380ba43eda7a75ff6644e1e5c7d7 SHA-1: 7d902c350a262e9e9faf6b681cc97fc35037bc2d SHA-256: e88fac49cabb481cf6784088f42d480c7e31c4412a7ae9365f6fc512bc522b3d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1539 Steal or Forge Credentials T1027 Obfuscated Files or Information

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it attempts to bypass security software and lure users into providing MFA codes or session tokens, consistent with credential phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to lead the user to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://fokemale.ru/strik?utm_term=kenwood+kdc-138+manual+en+espa%25C3%25B1ol PDF link annotation
    • http://rawoxaxevog.mygamesonline.org/83777044444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390069/normal_60252c51ba984.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449771/normal_5fe28e4d816c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473056/normal_60010e609dc29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491432/normal_601b7ea0a26d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501794/normal_601f69045e2c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444869/normal_602ffc3f37058.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5ffcfe3aa9e97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425255/normal_601f3bfe147b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456399/normal_5ff7cada434ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459624/normal_5fd85510bade7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_6027f339683b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gedimuta/83224943859.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/malibu_boat_trailer_guide_pole_covers.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/62640792154.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/pasesurevoxa.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/11231445013.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/muvek.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/90247229914.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001342a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342A 5656 bytes
SHA-256: d8005a2c71788dbd627281cbd503522ac6dbd3e7cdb151604fdd19d946225c7f
font_01_sfnt_off00014728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14728 13032 bytes
SHA-256: fcaf9742800c81d14eb93455a374f8efff6bb6c157435b32e7bbf688518daa8c
font_02_sfnt_off00017233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17233 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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