Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6818d907502ea90…

MALICIOUS

PDF

79.5 KB Created: 2021-02-07 22:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: effc6b1b62589ed817779fcfc0772a7d SHA-1: b4dc9cadc335a75bda581a3992a769cb0264df8d SHA-256: e6818d907502ea901e478ab16e78e4a1d39ff576cb1d1db8d642b30808068180
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the PDF structure and numerous external links suggest a phishing or content distribution attack.

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://bologen.ru/123?utm_term=house+in+riften PDF link annotation
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/5607475.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/sawimojimoxabos-molit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471091/normal_601b8c22a5949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501991/normal_5fd5fcc564579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378857/normal_5ff9d46edf0be.pdfIn PDF document text
    • http://pek-24.cc/my_android_phone_won_t_updateobnq0.pdfIn PDF document text
    • https://vajasefa.weebly.com/uploads/1/3/4/4/134490273/janevizox.pdfIn PDF document text
    • http://maska-respirator.shop/annual_report_vingroupnli8g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403417/normal_5ff36fdb7bf5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452839/normal_5fe554031f795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450037/normal_6009e80088f53.pdfIn PDF document text
    • https://sefokuto.weebly.com/uploads/1/3/0/7/130738721/masup.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/5380895.pdfIn PDF document text
    • http://forpost-electrica.ru/703146555707i96d.pdfIn PDF document text
    • https://taleputara.weebly.com/uploads/1/3/4/3/134305900/wamuwebaguxo.pdfIn PDF document text
    • http://hristogrigorov.com/dusedugid4pqcp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384655/normal_5fecd43879d3b.pdfIn PDF document text
    • https://vesokawewewavi.weebly.com/uploads/1/3/1/3/131382886/7dcae7cdf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473432/normal_5fee8d401592c.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/dowesitobuga/punjabi_bass_songs_for_car.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_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 4480 bytes
SHA-256: 50ab0a747830a4fd30632ca328bc6edf15987a8fdc3f8dec2d6789c1bca2d663
font_01_sfnt_off00010a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A36 11900 bytes
SHA-256: 1c1445ee3d779e1231988de6e30cadc51391b92bf24938ea8a50446c9b2fd171

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