Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d2a954ff2b7bac…

MALICIOUS

PDF

85.1 KB Created: 2020-12-16 22:10:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aea52c0e4395b5b8e1fbb40a39bde80c SHA-1: d15b4ce8f8a2a543ad9572c18760f597fe88f8ba SHA-256: 15d2a954ff2b7bac9b6a28e216bd8a59cc0f13a4bc1e556e610557ec0ef7a101
184 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and numerous external URLs. The presence of ML and ClamAV detections further supports its malicious nature. While no scripts were explicitly extracted, the structure suggests it's designed to redirect users to potentially harmful content hosted on external domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=dermestid+beetles+care
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5f91247fdc500.pdf
    • https://static.s123-cdn-static.com/uploads/4473890/normal_5fcbdd9ba0ca6.pdf
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/mafirino.pdf
    • https://cdn-cms.f-static.net/uploads/4393644/normal_5f8f3bda48c4c.pdf
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/guromikenafuvegu.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/67967b940dad2fd.pdf
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5f957da89f0cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d156e864-47ab-42de-b927-02264b59a578/dolevikimodemu.pdf
    • https://s3.amazonaws.com/fikuvine/8815360169.pdf
    • https://uploads.strikinglycdn.com/files/9aa2bc04-648a-4c24-87a2-87f1e25498a3/52965406764.pdf
    • https://uploads.strikinglycdn.com/files/029ea9f7-b94d-4806-b5d8-8c3639185663/tajudorifetoguduv.pdf
    • https://uploads.strikinglycdn.com/files/85dc4886-0924-46e2-9db4-6d5cd9ad8422/centripetal_forces_geography.pdf
    • https://uploads.strikinglycdn.com/files/8ad68332-8479-40ad-8839-6d6630bec01f/rekinazel.pdf
    • https://s3.amazonaws.com/gewisetug/convert_to_word_app_mac.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_off00011063.bin
9e1e91167336f91b616ed5f70d178b1b0144163b8b003965450fd2f3d0893c20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11063 5224 bytes
font_01_sfnt_off0001220d.bin
413a15e19e0f53dfd77f713b7b5ce2c150821779450dc7f24ad38ac0d0681c54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1220D 11044 bytes

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