Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74f0c83ec19bca5…

MALICIOUS

PDF

84.4 KB Created: 2021-03-19 10:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7e26a028abe05e8f1c7cf5011cebf717 SHA-1: 7d818ff4b062be8d5c043b1d3552b3d28963a69e SHA-256: f74f0c83ec19bca5aeafe08ae26efbb15271b7e2eceebc057251c70a8aff04fc
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ClamAV and an ML classifier. It contains numerous embedded URLs, with one prominent URL pointing to `jumiwimov.ru`. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates the PDF is part of a link farm hosted on disposable domains, suggesting a phishing or spam campaign. No scripts were extracted, but the presence of external URIs and the link farm nature strongly suggest a redirection to malicious content.

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://jumiwimov.ru/wix?keyword=%25D7%25A9%25D7%2598%25D7%2599%25D7%25A1%25D7%259C+%25D7%25A2%25D7%2595%25D7%25A0%25D7%2594+2+%25D7%25A4%25D7%25A8%25D7%25A7+8+%25D7%259C%25D7%25A6%25D7%25A4%25D7%2599%25D7%2599%25D7%2594+%25D7%2599%25D7%25A9%25D7%2599%25D7%25A8%25D7%2594+%25D7%25A1%25D7%2593%25D7%25A8%25D7%2595%25D7%25AA PDF link annotation
    • http://pixujuxe.mypressonline.com/definition_of_bioplastics.pdfIn PDF document text
    • http://sumodena.getenjoyment.net/95092313620.pdfIn PDF document text
    • http://yatvoyya.fun/56827250233ldv2o.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/texas_cdl_examiners_training_course.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/jgi84jh/miluxodoxanafirakar.pdfIn PDF document text
    • http://instahelpforbusiness.com/9813149947qiv45.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/iijcOhh/72604176800.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/Fy84hfT/70163687582.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/aircraft_crash_investigation.pdfIn PDF document text
    • http://xujaxul.mywebcommunity.org/calendar_2020_template.pdfIn PDF document text
    • https://cdn.sqhk.co/mojekuvugise/gdhbge1/arkham_horror_card_game_deck_box.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/Ojejcje/waviterawaluxukofekigegi.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/22970713176.pdfIn PDF document text
    • https://cdn.sqhk.co/jojewezalika/FAhfZja/candy_crush_jelly_saga_download_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gorevifero.epizy.com/suriga.pdfIn PDF document text
    • http://kofuzedu.epizy.com/carers_allowance_centrelink.pdfIn PDF document text
    • http://nepumunu.rf.gd/tecnologia_da_informao_aplicada_na_logistica.pdfIn PDF document text
    • http://pixagikaw.epizy.com/jinam.pdfIn PDF document text
    • http://fuwutowamig.myartsonline.com/1830373089.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_off000103f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F5 5644 bytes
SHA-256: 6f51a3aee785f9f457b4e5e7754d01e8ea03e195cd80ec2f1d32d78ca68b06f7
font_01_sfnt_off000117a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 12264 bytes
SHA-256: 9468f456a52b31a0e51a76affe710f255a2ea9899e18690e0f4855d49d09ce5e

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