Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aabef8e84667d78…

MALICIOUS

PDF

68.6 KB Created: 2021-01-04 16:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 74d7af1685c935475f3af0ba7b349550 SHA-1: e801808b2cce03097f8a016c642f32afcfe5e9b0 SHA-256: 2aabef8e84667d789b9ed98d9e6b0bd854770d8015880e65fe08bb9c5521002b
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, many of which appear to be part of a link farm designed to direct users to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The presence of a download lure and ClamAV detection further supports a malicious classification. While no scripts were extracted, the overall structure and heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?utm_term=zombie+catchers+mod+apk+old+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8ae79cd1282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450746/normal_5fbeffaf07c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8751ab080ee.pdfIn PDF document text
    • https://mepifinifiwiza.weebly.com/uploads/1/3/4/3/134334375/zaguworopa-bomifujural-lajosomosu.pdfIn PDF document text
    • https://mobesometug.weebly.com/uploads/1/3/4/6/134644263/6224697.pdfIn PDF document text
    • https://tazaliraku.weebly.com/uploads/1/3/4/8/134884946/jopuzagezifutomameni.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/b4dcff00-11a6-487d-b6b2-e12c5b4cf917/shawnee_tribe_clothing_made_of.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/36541155810.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/jerewebatidagunepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e175d05-b541-423d-98b4-070b318ead82/44199284639.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/49439971714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4de841-73f5-4dfe-a686-98f8d98ce5bc/60643087003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb38398-709f-4a6a-a328-fa61556d2526/vuzoge.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_off0000cc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC85 5536 bytes
SHA-256: 5ec3e80eab6c50cd1780dc3cacad59d9ca309bac99a3fd4b41010de535851d30
font_01_sfnt_off0000df2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2A 12112 bytes
SHA-256: 46c0838af64dc262e217240956b5c0de05e4ebbff6a5ac7fd069f55f14578803

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