Malicious PDF — malware analysis report

Static analysis result for SHA-256 f449cf500cdf3e4f…

MALICIOUS

PDF

96.4 KB Created: 2020-11-10 21:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 812d301d19044dca0b86682412b66ba0 SHA-1: ca6df6492feb4c27c2862c124cab3dccfa1bb2c0 SHA-256: f449cf500cdf3e4fa550460d6f288eeb78aa99eae4d5dbb200e4c0aaf5911a39
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious. It contains an embedded URL and is identified as a callback phishing lure, indicating an attempt to trick the user into contacting a malicious actor. The presence of an external URI suggests the document may attempt to download additional content or redirect the user to a malicious site.

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://traffine.ru/123?keyword=ironman+inversion+table+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471985/normal_5fa83cbec1003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5f894d090bf2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8801108406b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f87d5b1a61e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_5fa0de57ed9e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_5f904044428ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_5f951beb58d23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec913b5c-5fe0-4a9f-91cd-909669743328/4648230012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac765eee-4816-451f-bf09-375ad1ed2b57/62736317619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314befdf-eded-45a5-aa6c-d40dc50120c7/45256133589.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/autonomy_defined_by_philosophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/152d84ed-0b3c-403e-a72c-2835d49de386/bexawujipudimuraxipib.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/84897407599.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_off0001378a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378A 4968 bytes
SHA-256: 566a27cb44e0780af5fe0812e80c96ab9373bbe92d7cc3267a54fe9b96634e9c
font_01_sfnt_off00014858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14858 12700 bytes
SHA-256: 29601664410d2400575b28e502872821a5723b2ca72a652f8cd720d4de0ea9b5

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