Malicious PDF — malware analysis report

Static analysis result for SHA-256 af51804cf43478eb…

MALICIOUS

PDF

76.3 KB Created: 2020-12-19 10:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7d45b33a984af9f69911f2f919b65831 SHA-1: 3274f8ac1b3634f3af2ee3cc31ab5c64f5f1efce SHA-256: af51804cf43478ebe10d4c92e753e130ac1129c3bac02abadc0c60ebc3c98727
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or SEO poisoning tactic. The embedded URLs likely lead to further malicious content or phishing pages, aiming to deceive users into believing they are accessing legitimate game-related information.

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://trafficel.ru/strik?utm_term=goblin+slayer+game+pc PDF link annotation
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/pupexisagebanule.pdfIn PDF document text
    • https://xomilazarega.weebly.com/uploads/1/3/4/5/134511507/f34e9bc6bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499285/normal_5fc7f09ebcbe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486534/normal_5fb332e37dbb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495251/normal_5faf741858a87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8e5844f2ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5f962af63d0b0.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/67b99495-2c59-40b5-93ae-4cbe66fca7f4/didadu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27b65a8793968641242c3/t/5fc387e3bc819f1cf44625fb/1606649830114/73827974736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0221e936-53e1-44d1-b2e4-ad6354ad0d25/64068500314.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc514f6bf71053ccb2ab590/t/5fccdd245177ea328cc16e84/1607261476770/vamesawajatadatudiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af61c85-53c7-4dc2-a540-b4a5999ccf31/iglesia_de_dios_evangelio_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41fe07b4-4683-4c1a-aca3-412798b114e7/patekapakigekekad.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_off0000ed55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED55 5528 bytes
SHA-256: 9a81307c5f7725cfb9e983db662c56982b26fe5071ad5e39776e4fbdc6988c37
font_01_sfnt_off00010012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10012 10660 bytes
SHA-256: 4b74034b2cbeebbeb4ac8cadb83c69ce27b8d5fa656dcdd787809f3279f7e572

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