Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a04ea87246f907a…

MALICIOUS

PDF

76.2 KB Created: 2021-03-08 17:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9993989a6bf6c90189bcdee5e423eb1e SHA-1: dec71abaa156310dc498e11e2b09c652adeb4fab SHA-256: 9a04ea87246f907a36694703b298204cf54d290d3b74b79816eaa62618ae8c38
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for SEO manipulation or to distribute further malicious content. The embedded URLs and the document's structure strongly suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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://botokaw.ru/strik?utm_term=asp.net+tutorial+w3schools PDF link annotation
    • https://cdn.sqhk.co/rurewemanavi/i4iftjj/71299126260.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/ificVhd/bovitijegezeg.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/bovebeberolepalizug.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/ghjf8Tm/lofibevilelezafota.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/ghgjvjf/noxolowexonise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466172/normal_5fd6c88406f42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_6025632272ca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_5fdac62614d85.pdfIn PDF document text
    • http://sobakin.space/lukikifolenirebgkbp9.pdfIn PDF document text
    • http://rentline.pro/piwunemomididedasemofgx3qn.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/RQlibra/fuzanapatamula.pdfIn PDF document text
    • http://biwumani.mywebcommunity.org/arti_left_hand_path.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/how_to_write_measurable_goals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478716/normal_6012369908f4f.pdfIn PDF document text
    • http://hushseo.online/73459793791q77tb.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/idgiYge/download_my_talking_hank_unlimited_mod.pdfIn PDF document text
    • http://polfact.site/ximitipidunarodokop33py5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_601e115970c09.pdfIn PDF document text
    • http://helper-badges.com/exercices_de_conjugaison_3me_brevet3a1kj.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/kuhdHP6/4_pics_1_word_level_2222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_82f553caa3104f5083ae017f48731765.pdf?index=trueIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_18435f225cbd4e7fbe87ce132696ca94.pdf?index=trueIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_2c7512b664544c909a8084a0933e9a37.pdf?index=trueIn PDF document text
    • https://68f22c9b-09e1-4ffb-8b85-48f7de090316.filesusr.com/ugd/39a0fd_9b8c5a05582c47a2a195e7dc04df4a06.pdf?index=trueIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_451715180ada40989c5ef5f675e80147.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_off0000ebb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB1 5300 bytes
SHA-256: 2190a203ae4d6f4f7f5e7b5642a65ebea975867efa4fc9f7aae15705e6c0d3e0
font_01_sfnt_off0000fdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 11004 bytes
SHA-256: 11a03172a6d585f11d01ec6ee67e275102c475076cd4a569531251521cfdb25d