Malicious PDF — malware analysis report

Static analysis result for SHA-256 632904464e778275…

MALICIOUS

PDF

74.7 KB Created: 2020-11-09 21:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cd8fe3b68234d2f8b90807bf17f44e8c SHA-1: 38afae6ecea80475540f84e5dc813c7f44c3bb26 SHA-256: 632904464e7782751e562bf958f418d028c329205d53481f1ce4f892c7c9e994
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are hosted on domains commonly associated with SEO spam and phishing. The document body text, though heavily obfuscated, suggests a lure related to popular media, likely to trick users into clicking malicious links. The presence of a PDF_SEO_LINK_FARM heuristic firing further supports the conclusion that this document is part of a link farm designed to drive traffic to malicious sites.

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
  • 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://traffset.ru/123?keyword=family+guy+blue+harvest+full+movie+123 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f8e9c947463e.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/6361768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5f96895e5c89c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5fa028a026b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5fa21e69950e8.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/ginutu/minecraft_underground_biomes_texture_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e324fb6-74ca-40ff-8dce-d8da6bdabbd5/feponexab.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/gulowikalazokudofoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/lejitunugezufuwix.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/zadalibemilumifukur.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/gexamusisifegip.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_off0000e2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 5788 bytes
SHA-256: dbb10386be3df34f5978fc60fdd9b132c51073c85508fcbe6c77800423ff5df8
font_01_sfnt_off0000f676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF676 12476 bytes
SHA-256: e94e209d2d893c1e5f7d42fb9d9f6b2470076d9a9fe7cf86beb4f9399cd91a1c

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