Malicious PDF — malware analysis report

Static analysis result for SHA-256 985868988f44ef85…

MALICIOUS

PDF

74.2 KB Created: 2021-02-25 02:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 2b691d8a29aec251e38757f11c8bbcd2 SHA-1: 952b4fd1f9722ce208a71180ce05fbc7a56e20b5 SHA-256: 985868988f44ef85ef8388445ee2ec9766d38807a211acd88194e6f353d4680d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external links, including one to maypoin.ru, suggesting a phishing lure. The PDF structure and embedded links are consistent with a phishing campaign aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=t+fal+air+fryer+recipes+chicken+wings PDF link annotation
    • http://detixaluziweki.22web.org/numixakofupunipudologutod.pdfIn PDF document text
    • http://osummer.space/plank_exercise_guider454i.pdfIn PDF document text
    • http://dektesheff.xyz/46922070721hfv10.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/hhhiZlV/zedge_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/hghgZjf/best_deals_on_ipads_and_tablets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_601340652a52e.pdfIn PDF document text
    • http://yarrebitteh.online/874181967618vjaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474205/normal_603416d8e3d8b.pdfIn PDF document text
    • http://kartaidatodemeleri.com/sims_3_world_adventures_origin_codelyh4u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_601042d0206f4.pdfIn PDF document text
    • http://webdefilmizle.com/626066857427epkm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496204/normal_60276f0e6a001.pdfIn PDF document text
    • http://alluniversity.fun/tell_me_a_riddle_tillie_olsenmfog9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimitumepogamom.epizy.com/solvents_used_in_non_aqueous_titration.pdfIn PDF document text
    • http://kiluwuw.epizy.com/75646722578.pdfIn PDF document text
    • http://duzewinabo.epizy.com/jaxirapenotuvonuwexiwab.pdfIn PDF document text
    • http://pudawetik.rf.gd/27090623937.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_off0000e380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE380 5484 bytes
SHA-256: f5d7ca1a77854734fb607d652ee5027d406202deb27fc83dd9e57792ad94b9e6
font_01_sfnt_off0000f643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF643 11012 bytes
SHA-256: 2d96515b7e46313038b46f67bddb8f5c60d7569b6a9c76fa80b5e7d0204466a2

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