Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3534a4ee1735da…

MALICIOUS

PDF

63.7 KB Created: 2020-12-01 18:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c0eefbd1db0d8486403e1de5876b913f SHA-1: 96b7978d8fc2cad3331d74a2bd9a0be49c5b343a SHA-256: 4f3534a4ee1735daab128f508482861e42efa608a6ac5a9624aef5836c4ddfd6
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains an external URI and a callback phishing lure, suggesting an attempt to trick the user into contacting a malicious entity. The embedded URL likely serves as a landing page or part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffnew.ru/aws?utm_term=bc+spca+donation+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f94eb1a75133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5fc2da94a6aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5f92b4b88ba3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f93d60ddbcbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460042/normal_5fb25d3654577.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f88bd26ff1194f740ef3/t/5fc62d13fa04221c71f2b1f4/1606823188109/rebag_chanel_flap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86577ad4-4493-477f-990b-71a3baad6a7f/heroes_3_hd_edition_maps.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15bd3ff13940aa242d827/t/5fc2cd14145a8629dc0d483d/1606602008715/kakovumeroselisanofav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f3fc708-5e9d-4500-b4b0-6d6d2a302c39/power_amplifier_class_h.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef15f683-5b3f-4994-bf7a-9e8a406dd851/xejagojonazebul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00874a5bc066edfa0f7a0/t/5fc15a08f81c9a2a0cd49663/1606507018289/43568189187.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ca17acac6192ab71854/1606372514420/tabe_test_form_9_level_a_answer_key_reading.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf3e9edabee7b44068d2c/1606218730471/skyrim_forsaken_cave_glitch.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000baee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEE 5320 bytes
SHA-256: 1b55288a97db02497dca26624ce4bb2fcea6e615312a67e253c7449d84dabcd7
font_01_sfnt_off0000ccf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF4 10936 bytes
SHA-256: 5869e0a6c9d8579a00dd21fcab02484bf2a2fdfd3eb2488841c545e078426b30

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