Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6906a926c624a7…

MALICIOUS

PDF

74.6 KB Created: 2021-06-10 03:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3777f1177ccba3400e77ece2aec93b08 SHA-1: 488851769d38871002078a646cb3fde423b78433 SHA-256: 8d6906a926c624a70251d028131fa44f7748cc2034463df53fb74a480de57f2f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous external URLs, with a primary URL pointing to 'https://inwebjor.ru/pbw?utm_term=bohemian+rhapsody+piano+sheet+pdf+free'. The document's structure and the presence of many external links suggest an attempt to redirect users to potentially malicious sites, likely for credential harvesting or malware distribution.

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://inwebjor.ru/pbw?utm_term=bohemian+rhapsody+piano+sheet+pdf+free PDF link annotation
    • https://nabofirolem.weebly.com/uploads/1/3/4/6/134632364/2d0356d0ca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464072/normal_600b97f21dbdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448718/normal_5ff5f5b5bd266.pdfIn PDF document text
    • https://nilunoxevolen.weebly.com/uploads/1/3/5/3/135348116/2737328.pdfIn PDF document text
    • https://diwosilanula.weebly.com/uploads/1/3/4/7/134765308/raxudogovaku.pdfIn PDF document text
    • https://febukorev.weebly.com/uploads/1/3/4/3/134325382/jebugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_604f37834fe1c.pdfIn PDF document text
    • https://dofixojibol.weebly.com/uploads/1/3/0/8/130874360/0288a63a5eb96f.pdfIn PDF document text
    • https://ropifupagefe.weebly.com/uploads/1/3/4/5/134584424/a2ea8e127db725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_60348263414ce.pdfIn PDF document text
    • https://jevavuxenexek.weebly.com/uploads/1/3/5/3/135351486/zejigatopuvovog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_6052ddf26963a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vedufid.pbworks.com/w/file/fetch/144512358/wutigumugikip.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144413793/ravpower_filehub_password_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e5cfe6-4b14-4da3-802d-c730f19f7732/10_generation_family_tree_template_excel_free.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/f/galaxy_one_ui_theme_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c351275-2ea7-4c5a-a161-4b6406210734/rakuji.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/f/gta_sa_hile_program_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0d82d23-5e5a-4f2d-b78b-2fb7a1b28b22/how_to_make_a_relapse_prevention_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d243079-183c-4d57-806c-972496dae599/quotes_from_le_petit_prince_en_francais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d2a71d7-6a1d-460f-94a0-07687bb561e0/ice_fishing_tips_for_rainbow_trout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16c355a-41b5-47f1-a6c7-686c73c7d944/lodivinoninekirux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e810209-2e01-4489-970c-1687c0a8ddbe/68930198260.pdfIn PDF document text
    • http://xobapotowi.pbworks.com/f/estadistica_para_administracion_y_economia_levin.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_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 5400 bytes
SHA-256: 11911ca0963b9493f37b8c95738981fb4445dbaf3ac8053a049994fea7abf6b7
font_01_sfnt_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 11780 bytes
SHA-256: 1f5db482b207958400cadc7b8383438615683817fe9354ee5953bdaedcc71887

Open this report in the interactive analyzer, or submit your own file for analysis.