Malicious PDF — malware analysis report

Static analysis result for SHA-256 67067dbdd4e54381…

MALICIOUS

PDF

87.8 KB Created: 2020-12-02 23:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6d7a3edfbd79b8a6b1e0c0d908628a0f SHA-1: d9365b20c4849b5d1df36d0ef6a2b4472b037576 SHA-256: 67067dbdd4e54381bc32d108b6100ddb08e3409f44e02d6854ba4ea33973b1e8
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or redirection mechanism. The 'SE_CALLBACK_LURE' heuristic indicates it may also be used for phishing or tech-support scams, although the primary observed behavior is the extensive linking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafffi.ru/aws?utm_term=ia+dnr+fishing+report PDF link annotation
    • https://legunumazonum.weebly.com/uploads/1/3/4/4/134455594/3374780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446374/normal_5fa2336b40191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f9250d8a32c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_5fc422fae095d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_5f9c56e36a394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5fa8872d90f46.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/titibetuzedati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5f8f78f1a60cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5f911699a3411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5f8ede497c19c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458840/normal_5fc3552b20aea.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/31d3b90e-d36d-48be-9745-9e6a31b2c50c/escuela_de_negocios_robert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e284d3-0bf5-4dc8-bf38-0b147c7107df/wicked_ties_shayla_black_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef8594d-1afc-477c-b3ef-f588d9c3a96d/jegijor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E0 2968 bytes
SHA-256: 1c91280eb79ffdc858b6ecd2b9b1b9121e398c569f5702dd47e27479ee3b0056
font_01_sfnt_off00011d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D86 5208 bytes
SHA-256: 0cdea0367a61b2bb75ef0e56074c13a33f9cb9fa3eb25e0546a51df9e89f76a5
font_02_sfnt_off00012f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3F 10108 bytes
SHA-256: ed6aa06cef42d9c33b2048e19c979626a0782df61ed87f45ddcad007628a8975

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