Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45254bbabf534b3…

MALICIOUS

PDF

72.8 KB Created: 2020-12-25 13:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 718d482087ab6702b9d59472814ea4a2 SHA-1: ee447a6db13404f907ed616d7a86f5288f5f5951 SHA-256: d45254bbabf534b30b6125c6848c9273b41dd3d4d9e10ec3b97cd2a683e6345d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic point towards an attempt to exploit search engine optimization techniques to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=smashing+rush+parkour+action+run+mod+apk PDF link annotation
    • https://donaxitod.weebly.com/uploads/1/3/4/6/134688316/dinega_jebipozesol_nolanotasen.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/dodoxotokaso-jekupeba-kewawomolorukig.pdfIn PDF document text
    • https://pukutititoj.weebly.com/uploads/1/3/1/3/131383613/tedunekulamumuna.pdfIn PDF document text
    • https://kogewovedof.weebly.com/uploads/1/3/4/3/134339257/jolevutaripusowireke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/50694f26-6f69-4d42-8a4a-dfcec6b74b6d/arma_3_manual_trim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db994745-f561-432b-8eff-f2659dc5dc91/blue_like_jazz_chapter_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4efdd09b-d711-4848-8e55-304ddd42d968/kunewonusazi.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/38799863386.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/revenue_canada_forms_disability_tax_credit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de492813-b069-4f1e-bc1c-0df57b5bb052/xawejujenuxixetupumok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fdedff-fec3-48e8-8a31-a23d076115ac/whatever_life_throws_at_you_epub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF5 5388 bytes
SHA-256: 99b95ddb4d506914e0b7c095789e5e8529601ec0a5ede7469b9fa684ccd24275
font_01_sfnt_off0000e208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 11420 bytes
SHA-256: 3349f7007b6255bf56ec34c0c50f80aa59213607ed70ad8025b9d4f11748c7ab
font_02_sfnt_off0001088e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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