Malicious PDF — malware analysis report

Static analysis result for SHA-256 254922a1879a4a9c…

MALICIOUS

PDF

67.1 KB Created: 2021-03-16 07:36:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 206404fa9d4685c3d88d13608cb183d7 SHA-1: 96bf99c318d632b89887c43d7a82fc6d666a9e01 SHA-256: 254922a1879a4a9ce8201be7136e5852ba0b0e6cba1b781fcdaea20ac6a83ace
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF contains a large number of external links, many pointing to disposable domains and potentially malicious content, as indicated by the PDF_SEO_LINK_FARM and PDF_SUSPICIOUS_LINK_LURE heuristics. The ClamAV detection and ML classifier further support its malicious nature. The primary attack pattern involves redirecting users to external sites, likely for phishing or to download further malware, leveraging a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://seumenha.ru/wix?keyword=ilco+motorcycle+key+guide PDF link annotation
    • https://cdn.sqhk.co/fekigimuzib/jemyje4/kodi_firestick_addons.pdfIn PDF document text
    • https://fevebelok.weebly.com/uploads/1/3/4/0/134012800/8d0e90d9b.pdfIn PDF document text
    • http://trastenmyqort.online/sig_sauer_357_v_9mm_147_grainhgh8o.pdfIn PDF document text
    • http://affilateapp.online/honda_eu2000i_inverter_generator_best_pricen9rk4.pdfIn PDF document text
    • http://libralab.digital/58052497179jj1ha.pdfIn PDF document text
    • https://goguribepolim.weebly.com/uploads/1/3/0/7/130739596/vuvunexenakid-puzofezefot.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/j6uqOjf/35339453965.pdfIn PDF document text
    • http://kyukty68.xyz/basic_electrical_engineering_interview_questionsvgr81.pdfIn PDF document text
    • http://firstreadersclub.com/cisco_anyconnect_secure_mobility_clikyq9o.pdfIn PDF document text
    • http://esclub.pro/westworld_soundtrack_piano_sheet_musicjmra9.pdfIn PDF document text
    • https://pafetujesotizi.weebly.com/uploads/1/3/5/3/135348857/nixuzerafonazofujidu.pdfIn PDF document text
    • https://likeledizu.weebly.com/uploads/1/3/5/3/135312051/kabexabikunolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_604a2cf676091.pdfIn PDF document text
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/e74312f25fc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415937/normal_5ff7d739efde7.pdfIn PDF document text
    • http://lnstagram-support.live/72801451731aqi88.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/A0MZhb5/b._o._t._a._tarot_deck_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_55c749a0c1794cea813c83f0ea24b297.pdf?index=trueIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_aab062ec462446569dfea8eff98195bd.pdf?index=trueIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_bc22cea89c8344cd8c7e8104de67dab9.pdf?index=trueIn 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_off0000c987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC987 4976 bytes
SHA-256: 88455686c2c10e870a6d818fccfbc97e52b54fd9273c68c028fbc23cac9b7380
font_01_sfnt_off0000da6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6B 10688 bytes
SHA-256: f2edf5b15c6652673a888904e21ad12b9c2fe86bc1cdeac55d31a095310f766e