Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ceac2ed1eb41da…

MALICIOUS

PDF

62.8 KB Created: 2020-12-21 02:16:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5000656c2d3d549345400a352d6f031f SHA-1: 5d9df5b553d7cb370517080656cc2b09c47e5b82 SHA-256: 63ceac2ed1eb41da8281e1e1eea74f2578aa9a332b94b019ddd39c4b8812e921
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO spam campaign. The primary URL identified, 'https://traffset.ru/strik?utm_term=lego+batman+2+dc+super+heroes+walkthrough', indicates a lure related to a game walkthrough. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely for phishing or driving 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/strik?utm_term=lego+batman+2+dc+super+heroes+walkthrough PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416316/normal_5f98df3685318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406229/normal_5fcb1487ad95a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492573/normal_5faf716d18c3d.pdfIn PDF document text
    • https://roxunasof.weebly.com/uploads/1/3/4/3/134312726/komifawovupileg-wezupotis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f87adaac7392.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453579/normal_5fc62d7e43859.pdfIn PDF document text
    • https://rokolumer.weebly.com/uploads/1/3/0/9/130969153/f2b5007e1a635c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f9ce6e782617.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5fc5121c642a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdfd9dcd610986319781dd0/t/5fdfe6a2d85ca2644225603e/1608509090747/vilotunixumuvunabafi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc013fe3398ff751529adbc/t/5fc17f3a9ee0f32b878b9947/1606516541437/58901373506.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_off0000b517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB517 5856 bytes
SHA-256: 8e11e9fe9c2948c5db95fdb97ac6fcb1e54e8287b3867fe6f4ed3b3c6c14a8b1
font_01_sfnt_off0000c8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F3 11112 bytes
SHA-256: 8a8a746ada87e14867fc9e4bcfd1008e2b4f87a0c43fbf38a6e8740873529aa7

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