Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe56689167d0417e…

MALICIOUS

PDF

77.3 KB Created: 2021-03-28 12:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 464c9ffc4b4b830cdb4c8e7ffc408dd6 SHA-1: b2d39779ef01c75e6655068464bba78505bd40a9 SHA-256: fe56689167d0417e3442b047947bfbccb0ce000cfe83fc6c4141734678045fe5
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://zajinet.ru/123?utm_term=minimalismo+pdf+libro PDF link annotation
    • http://arenda-comp.space/45157195873mp4wq.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/jjhiijk/tv_guide_listings_uk.pdfIn PDF document text
    • http://gvidilon.ru/pufibajeweduxudivujanigpl3w9.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/6649678.pdfIn PDF document text
    • https://betozuwozoz.weebly.com/uploads/1/3/4/1/134108580/getodeze-kokusavase.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenilu/4jcfpNR/castle_wars_2_kongregate.pdfIn PDF document text
    • https://pusasosabuni.weebly.com/uploads/1/3/4/6/134654602/tarok.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/powusokelelo.pdfIn PDF document text
    • https://rajarajo.weebly.com/uploads/1/3/1/3/131398110/lokijizujasox_xavoletaw.pdfIn PDF document text
    • http://maturibcgj.space/27884945718gzvuk.pdfIn PDF document text
    • https://devanuwi.weebly.com/uploads/1/3/0/9/130969177/41a2d554f.pdfIn PDF document text
    • http://romeoplanet.club/98113401061iq1y6.pdfIn PDF document text
    • https://cdn.sqhk.co/pejasibupap/54Liwje/18937909515.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/ugcZjcx/like_formal_wear_crossword_clue.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/public_relations_specialist_definition.pdfIn PDF document text
    • http://daravto18.ru/bleach_immortal_soul_soul_hall_guide105tu.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/iigiihJ/fabfitfun_winter_2020_spoilers_dates.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/fT1jad2/3888669683.pdfIn PDF document text
    • http://sirunome.mypressonline.com/brexit_deal_draft_agreement_in_full.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_d9de2f491a164bf783625b3e6183f404.pdf?index=trueIn PDF document text
    • https://16b16ea1-1eac-4681-bfdb-39d0b7b0c60a.filesusr.com/ugd/d6b497_b44666a2baaf429e93e3196d08351962.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_off0000eff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF9 5332 bytes
SHA-256: e058bb38ec7534294134dcc560f1f1d3f9c037414baeb65298f06ff787fd4ba8
font_01_sfnt_off00010202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10202 11816 bytes
SHA-256: cf02832a6df167b2239497927a9a3da0c88cbcb40c1ca26bbf6d141d28d39e29

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