Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd69bab22cf627e…

MALICIOUS

PDF

66.9 KB Created: 2021-02-24 07:07:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 12d29bfa101918623a0b746a1b8d92c1 SHA-1: 5040a9d48783b2bf3b54e0cf79f347aeb653c132 SHA-256: fbd69bab22cf627e2aa7ecc4d6978b044a3d03b221ea52f0c4e0096884fcb07b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a "PDF_SEO_LINK_FARM" heuristic, suggesting an attempt to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing lure disguised as a document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/123?utm_term=dressage+intro+a+test+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415782/normal_5fe5004da2204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481831/normal_5fcdd16ba8e51.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/dfifjgg/gixawesa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469349/normal_600361a24bd4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_6010622deffd5.pdfIn PDF document text
    • https://dubelaxelafef.weebly.com/uploads/1/3/1/1/131164372/gikowipubuwaje.pdfIn PDF document text
    • http://titoto.xyz/zebazewojakidp93og.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421051/normal_60057de6b02c8.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/jdehfAy/35252879142.pdfIn PDF document text
    • https://cdn.sqhk.co/kixituvelil/sxieahh/senivunadedibuleme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_5fdc4a2f57195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_60339a8e86c83.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxifup/PWhfhcO/train_simulator_ps4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C2 4912 bytes
SHA-256: 90330bfafac24a0b2ee798647be312e48420e80655fe0f06d0ea11f3b2f6a3b0
font_01_sfnt_off0000da78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA78 10752 bytes
SHA-256: c5c0245e092961ab108786f053079ee4697d99ad5e48dd97fa70200ed7a142b4

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