Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7601cb0729d01fa…

MALICIOUS

PDF

69.1 KB Created: 2021-01-23 06:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 577ed8a7b5f0eba2320ab60b18e6e4a5 SHA-1: 8efa842fcb86424052b64c30bb3e92628235a708 SHA-256: e7601cb0729d01fa6308ae1e24416c6a3e31b9ad4b6ff3c79bcb5953855bc4f1
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://crophysi.ru/123?utm_term=apush+period+1+key+concepts+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4501965/normal_5fd819b83f986.pdfIn PDF document text
    • https://site-1250663.mozfiles.com/files/1250663/27642400030.pdfIn PDF document text
    • https://site-1168133.mozfiles.com/files/1168133/shoot_bubble_fruit_splash_hack_apk.pdfIn PDF document text
    • https://wepusiviji.weebly.com/uploads/1/3/4/6/134661614/kepepatutelibob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410722/normal_6009104357777.pdfIn PDF document text
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/cf57d92afa9b.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/gdrQdhi/andrew_james_retro_popcorn_maker_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/igejeiY/26259315625.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/xupadow.pdfIn PDF document text
    • https://site-1176664.mozfiles.com/files/1176664/simemujiruriziwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5fe2b2e44c409.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/Fgfhbha/65184538303.pdfIn PDF document text
    • https://malugeko.weebly.com/uploads/1/3/1/6/131636988/nibog.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/XF84MRc/the_hundred_years_war_brief_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_5fe77443d8056.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/Hbvjiih/redeem_code_voucher_ml_dunia_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484994/normal_5fcbd53bc93dd.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/7277713.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BD 5208 bytes
SHA-256: e50b0b13c25aafa22efc7c16c9ad9582a66633ae341d339de6b1d46650a6d372
font_01_sfnt_off0000e486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE486 10296 bytes
SHA-256: a5eee15f74ae777838d855e8032891e5553182e0efd62a2a3d53562bccc1b1b4