Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf44883ad0a34df…

MALICIOUS

PDF

74.0 KB Created: 2021-02-10 00:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a5ac1b78f1b74f0e529f4584776eba66 SHA-1: 7b2769ecbff6bdcb18d8cf0988afcff02041f719 SHA-256: 7cf44883ad0a34df784eedf6bffbea0336d7a1681bbd73300dde0b8e6b1c2e51
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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.
  • 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://bologen.ru/wb?keyword=consumo%20cerato%202013%20manual PDF link annotation
    • https://cdn.sqhk.co/sovokeduseb/Puk6Fhg/viwumukarujofobo.pdfIn PDF document text
    • https://bipasomuted.weebly.com/uploads/1/3/6/0/136010989/vosupava.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/4jgqgfK/fish_livewell_for_boat.pdfIn PDF document text
    • http://dazefoxezizu.iblogger.org/canon_mg3650_setup_guide.pdfIn PDF document text
    • https://kurixaxewa.weebly.com/uploads/1/3/1/3/131383664/7054732.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/eh6Gvid/77545718906.pdfIn PDF document text
    • https://fufiwixafuwisu.weebly.com/uploads/1/3/4/7/134770326/lawebulajotilumix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fe0cff7258c6.pdfIn PDF document text
    • https://nuvafuriwevejuf.weebly.com/uploads/1/3/2/8/132814848/puzebijed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492880/normal_5fea3913bdd21.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/ropozabe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452161/normal_5fee70826c891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kezasifofajimo.rf.gd/calpers_457_distribution_request_form.pdfIn PDF document text
    • http://pabisuf.epizy.com/70908237297.pdfIn PDF document text
    • http://fifusudevop.rf.gd/bike_race_free_mod_android_1.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_off0000e0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E7 5340 bytes
SHA-256: bc7e570cea4590a40a1904ae73aad76c9a8d96f5f6e4a9d9c3c4f90696fd3a9e
font_01_sfnt_off0000f2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 12748 bytes
SHA-256: cc660cb665966989b941f04ce714e69cbfaa03c816695529113b60ea7abc34f3