Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a34e3d19a2c2996…

MALICIOUS

PDF

62.9 KB Created: 2021-02-04 07:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 225b4e33dc9493ec05a7fd19e2a45ec5 SHA-1: ec63d02f964d6f7f58d97240ebbbfabbc1d8e41d SHA-256: 4a34e3d19a2c29962b4c02457f5d83899da69b5e321c4d560340e3e8a163d6db
116 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, consistent with phishing or tech-support scams. An external URI pointing to 'baarspo.ru' was extracted, suggesting a potential command and control or redirection endpoint.

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://baarspo.ru/aws?utm_term=lamesa+press+reporter+phone+number PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5ffdb9657021c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489725/normal_5fd7d9b059576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366661/normal_5fcd72c904566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417221/normal_5fee32635a774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455197/normal_5fde34f78293f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467564/normal_5ffbb03d5722c.pdfIn PDF document text
    • https://cdn.sqhk.co/pejinijew/eghggji/12659105599.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/sUihHgi/66140921287.pdfIn PDF document text
    • http://dkshlyap.ru/26541523973jy9af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tomaxade/wazegov.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/canada_goose_jacket_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/83285450890.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/oklahoma_warranty_deed_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/59919013823.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_off0000bb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6B 5108 bytes
SHA-256: 24935978bb72889d564cdb3b3f3b7698c0183e9b96d2a6e6ccd0c4c40341499b
font_01_sfnt_off0000cc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9C 10024 bytes
SHA-256: 1ff042b2954ebc1b43917de659c5679799078dd299c0080d210754be34443248

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