Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d44eabe17d5e3b5…

MALICIOUS

PDF

71.0 KB Created: 2020-11-10 07:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25f99483df7a69f50fc67fde1ee49215 SHA-1: bef4e5189e20c6242c81a9ab1ceface4e396f5f6 SHA-256: 8d44eabe17d5e3b5cefbfce3cf22c7caeb05a4d741831ce05ccdb00366591f63
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, consistent with callback phishing or tech-support scams. The embedded URL points to a suspicious domain, likely part of the lure or a secondary payload delivery mechanism.

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://trafficel.ru/aws?keyword=cps+employee+portal
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fa41977e83cb.pdf
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5f948a6b0452f.pdf
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f8745c150e0d.pdf
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/6442210.pdf
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/gerujopap.pdf
    • https://tedibijufu.weebly.com/uploads/1/3/4/6/134678634/7378284.pdf
    • https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/duniwisosanilesetov.pdf
    • https://cdn-cms.f-static.net/uploads/4416151/normal_5fa9e635946db.pdf
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f91dba51f401.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/89bde713-0eb3-4eec-844c-3b8f6b42c4bc/mosixuvovaxukodikipowixek.pdf
    • https://uploads.strikinglycdn.com/files/43e24296-a28e-4fd5-8dee-f735d3f03cf8/vabiwopimif.pdf
    • https://uploads.strikinglycdn.com/files/3fb2e627-7ee1-40ef-b491-4e5dcf794f4c/69459600042.pdf
    • https://uploads.strikinglycdn.com/files/755168c8-2772-4f78-bf9d-f6a88c556247/canon_in_d_major_violin_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/11e1fbca-321d-4f60-bf4a-5b46f9ad8ea5/leraxamap.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8fd.bin
b488f41f7a553fe4a49d2881b821baf3b1fdbc5224a6bfd6dccc991e0d584925
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FD 4972 bytes
font_01_sfnt_off0000e9cd.bin
d6578557b13b24524dd6e507e8bd5eb880aebe3acedb9a0b51d7a0ae76fc5f9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 10972 bytes