Malicious PDF — malware analysis report

Static analysis result for SHA-256 539330418efc4f72…

MALICIOUS

PDF

72.7 KB Created: 2021-03-02 21:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4d20f00f26f650eaad56810787197e08 SHA-1: 9f409d34326469ba0733e785790c09a6fab3d495 SHA-256: 539330418efc4f724508f542eafecaf168a2b840c874505db054b52e77f1da6a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/wb?keyword=how%20to%20get%20job%20in%20electrical%20engineering PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467927/normal_603db7cf8961e.pdfIn PDF document text
    • http://rm-swis-mine.com/chicken_invaders_3_xmas_hdstqdl.pdfIn PDF document text
    • https://lemamoramu.weebly.com/uploads/1/3/5/3/135348447/4619fc54dc4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_5fea4143a1d73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_600ab0122eb74.pdfIn PDF document text
    • http://20970907.net/actor_vijayakanth_songsefotu.pdfIn PDF document text
    • https://werobipopopavuv.weebly.com/uploads/1/3/1/1/131163729/bosapubikor.pdfIn PDF document text
    • http://imkl-checker.com/inequality_how_wealth_becomes_power_3_3uyvun.pdfIn PDF document text
    • https://zowimebewira.weebly.com/uploads/1/3/1/6/131606727/rimilowotasox-patalowiredol-gomiruseva-tewamotalapa.pdfIn PDF document text
    • http://peskomment.ru/20633008193zu82o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417662/normal_600cee6c7413e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_6012db03ad97d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://malogamezomido.rf.gd/misapodemizasiriwolelesu.pdfIn PDF document text
    • http://nitesegu.epizy.com/vulutifaxa.pdfIn PDF document text
    • http://lojurixerura.epizy.com/92496776592.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_off0000df29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF29 5060 bytes
SHA-256: 05dd1b4c6e36abbd7161c75a7e0b251b1b0af4db4a1da9d9e4b04dc47f88dac7
font_01_sfnt_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 10936 bytes
SHA-256: 456bb7b92975136e4625d47aa6288a8bf9a07af9792cb316cd4b95bdfb285501