Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af7cf1e9611b68e…

MALICIOUS

PDF

76.6 KB Created: 2021-03-19 22:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2208a4ec4cbde8940efcbaf3655db4ce SHA-1: e0632ffff1b6075ad50d7f6de17e437fb8c4e314 SHA-256: 0af7cf1e9611b68ef657be010fe2e6969338d0f4bbde477910a001ec2ca6e5bc
126 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. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link distribution, and the presence of multiple URLs points towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://fokemale.ru/strik?utm_term=how+to+write+a+nursing+case+study PDF link annotation
    • https://bazodezivif.weebly.com/uploads/1/3/6/0/136088162/7907825.pdfIn PDF document text
    • http://gofidiva.iblogger.org/meaning_of_social_mobility.pdfIn PDF document text
    • http://xozowilozoga.mywebcommunity.org/sociology_upendra_sir_notes.pdfIn PDF document text
    • http://sberbank.services/agni_5_missile_videozp4p0.pdfIn PDF document text
    • http://stavki-na-sport.site/veguwirumidupilolefibale97smk.pdfIn PDF document text
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/98ad12ebcc2b87.pdfIn PDF document text
    • https://cdn.sqhk.co/mizopopowaze/gdhdMyE/castrol_edge_extended_performance_synthetic_engine.pdfIn PDF document text
    • http://crysety.xyz/unesco_2015_global_citizenship_educationnuqc7.pdfIn PDF document text
    • http://femikig.22web.org/runerogewuzixakazaniviga.pdfIn PDF document text
    • https://babixedijifaz.weebly.com/uploads/1/3/5/3/135385025/7818043.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawitaxug/jiia5Wg/telonewevuwutuje.pdfIn PDF document text
    • https://tonuwuro.weebly.com/uploads/1/3/0/7/130739505/331198.pdfIn PDF document text
    • http://nudistoff.club/nijekokof17nf.pdfIn PDF document text
    • http://nurukemuwonudu.iblogger.org/57604402708.pdfIn PDF document text
    • http://detonicufficiale.website/what_kind_of_oil_does_a_toro_lawn_mower_usemz4nq.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/zoxenakizuruvaju.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/worujorigagu.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/2jjHM5J/5118780401.pdfIn PDF document text
    • http://copyrightsupporteds.com/newaxotilanoxitulinupboqe.pdfIn PDF document text
    • http://zukirudon.mypressonline.com/95835888450.pdfIn PDF document text
    • https://cdn.sqhk.co/munemuzabuk/dichlGM/32792102051.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/siluludonitarujenile.pdfIn PDF document text
    • http://visiblawty.com/33514696922nb2s9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vefodipox.myartsonline.com/counterproductive_work_behavior_questionnaire.pdfIn PDF document text
    • http://gadivedu.rf.gd/the_facts_in_the_case_of_m._valdemar_movie.pdfIn PDF document text
    • http://nujexaraxeb.epizy.com/carbon_pile_voltage_regulator.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_off0000eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 5232 bytes
SHA-256: ba27f78c361ab303597ef6308dcada562d84f1559578309987efae4a1c66d6d9
font_01_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 10396 bytes
SHA-256: 8c6dfd26e94e29e83d6ab84e8aaec95963a33ba0c935d147e215679f7a2dd7df

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