Malicious PDF — malware analysis report

Static analysis result for SHA-256 2303f48087bc0adc…

MALICIOUS

PDF

83.3 KB Created: 2021-01-05 05:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6737c9def7966045e15fe99092ef389f SHA-1: d6835eca249e9014e6f807f54d3e93980de1cb90 SHA-256: 2303f48087bc0adc86278c1bfaa89aa0ba9a442c11d923cf02c9858939e56416
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded links, such as 'https://traffine.ru/aws?utm_term=diablo+3+witch+doctor+fast+leveling+guide', likely lead to phishing sites or further malware. The document's structure suggests it's designed to host a large number of outbound links, potentially for SEO poisoning or to distribute malicious content.

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
  • 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.
  • 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://traffine.ru/aws?utm_term=diablo+3+witch+doctor+fast+leveling+guide In PDF document text
    • https://cdn.sqhk.co/kemuxilajig/fghLuig/recharge_app_online_recharge_prepaid_and_postpaid_plans.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5fd22fdadbd14.pdfIn PDF document text
    • https://cdn.sqhk.co/xoripudesew/1hEFDqN/the_poughkeepsie_tapes_trailer_espanol_latino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5fc0515445f35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5fc591f516733.pdfIn PDF document text
    • https://cdn.sqhk.co/fokivetezabu/RDHa7ZN/medieval_war_horse_crossword_clue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f9a922c71c7f.pdfIn PDF document text
    • https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/abaef6cb.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/icnJicX/paint_sprayer_for_cabinets_reviews.pdfIn PDF document text
    • https://nurekagenarufab.weebly.com/uploads/1/3/1/6/131636906/eab13a31fdea0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5fde2f82312d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450501/normal_5f9fc97446d4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f8fd982709e8.pdfIn PDF document text
    • https://votivugaxowo.weebly.com/uploads/1/3/1/1/131163932/gotubaxusut.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/4821e6ec-9422-4a8a-8587-980977546fb0/rabinitibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02f49b2-b4e9-4667-ab73-0663ed9179dd/43994278944.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_off00010703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10703 5736 bytes
SHA-256: 945b8ea3e639adec452b6422aab6b18cfb6a7fd36996141b2b210e4071ceb25e
font_01_sfnt_off00011aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA2 10916 bytes
SHA-256: c48f8822f424c28c878849c59ed0b8b1dd187c23c1823ce48335bd97e9a5c361

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