Malicious PDF — malware analysis report

Static analysis result for SHA-256 631fbe3c706d80ba…

MALICIOUS

PDF

71.1 KB Created: 2021-02-18 12:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 005e889337591549a72cd6e3c04d27d4 SHA-1: c98d848a69cda800d87797cb0d8ee017557be4aa SHA-256: 631fbe3c706d80ba5aa80b44715f027bab885bd712220caeda3ef9926233e6c4
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/aws?utm_term=pocket+bike+repair+kit In PDF document text
    • https://static.s123-cdn-static.com/uploads/4472773/normal_5fc7a2625cda5.pdfIn PDF document text
    • http://organicsss.space/god_of_war_3_ppsspp_only_androiddndpw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476142/normal_5fee9c62c2164.pdfIn PDF document text
    • http://matroskin.space/gofodemepoxixififemkksv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fd3350e42aba.pdfIn PDF document text
    • https://xinuxarovota.weebly.com/uploads/1/3/0/7/130776268/263fa87.pdfIn PDF document text
    • https://zuzivosojix.weebly.com/uploads/1/3/0/7/130775151/lanaloz.pdfIn PDF document text
    • https://sokasabakowupop.weebly.com/uploads/1/3/4/0/134012989/sazasogume_fagenasuneni.pdfIn PDF document text
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/9092935.pdfIn PDF document text
    • http://blaugrana.ru/149909683n0wmz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_6022e73a246e2.pdfIn PDF document text
    • https://nikojaba.weebly.com/uploads/1/3/4/6/134683319/pelevalalolil.pdfIn PDF document text
    • https://kubasujile.weebly.com/uploads/1/3/0/7/130776158/9a3cc06f.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/56199553513llhzn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366306/normal_5fe384cca55b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wekazuvenasiwuf.epizy.com/approval_request_letter_template.pdfIn PDF document text
    • http://pixokux.rf.gd/bluetooth_remote_software_for_pc_free.pdfIn PDF document text
    • http://nuvotadaxiti.epizy.com/wetonipelalibamobabi.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_off0000d9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B4 4924 bytes
SHA-256: b76c12cb4639961cf1e4c993a75b2c2047b53f3e5868ffb4e34b21836bb66275
font_01_sfnt_off0000ea83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA83 10832 bytes
SHA-256: 7038f6d435e11d65789ee957b5f22baf104c78487a2c7ff8bd691dd913d2bd69

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