Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f0c92e448f8f87…

MALICIOUS

PDF

74.3 KB Created: 2021-03-01 00:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fce477ce396f1c9d189e8af05401c170 SHA-1: b26e55c425047f8260184c391bd420e822ad135d SHA-256: 23f0c92e448f8f87b2c2ea947809010260157ac1efb1a142d2cf05a2cfa39cd1
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://xezojetit.ru/123?utm_term=nail+supply+store+near+me+now PDF link annotation
    • http://lovepositions.info/bamaratibomonimawuxetunn05tb.pdfIn PDF document text
    • http://copyrightnotice-ig.com/best_note_taking_strategies_for_mathxszd9.pdfIn PDF document text
    • https://cdn.sqhk.co/gelowidabik/hcicqdC/pugixinum.pdfIn PDF document text
    • https://cdn.sqhk.co/bepifopid/WgeggXd/bosemepumosefuzojuris.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/63771968354ihtjo.pdfIn PDF document text
    • https://mufikufit.weebly.com/uploads/1/3/4/7/134766202/nonaruj.pdfIn PDF document text
    • http://naturalm.space/how_much_protein_is_in_chick_fil_a_grilled_nuggets1hyek.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/1Xp79id/nimifejajuxibi.pdfIn PDF document text
    • https://cdn.sqhk.co/xisofofumew/aiagexU/jofuxipemo.pdfIn PDF document text
    • http://vinorama.fun/fever_pitch_book_summaryb2ksn.pdfIn PDF document text
    • https://xijafidul.weebly.com/uploads/1/3/2/3/132303061/6438190.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/jcijpje/50171759627.pdfIn PDF document text
    • https://dufelawukada.weebly.com/uploads/1/3/2/6/132682042/kapuxagizuwogosagu.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/8750071.pdfIn PDF document text
    • https://posilopawirina.weebly.com/uploads/1/3/4/3/134353572/xekaxemaboxe.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/iZjigiZ/dog_simulator_animal_life_mod_apk.pdfIn PDF document text
    • http://pumexewutide.22web.org/45979302590.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rozatibex.rf.gd/ballay_ballay_full_song.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_off0000e429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 5128 bytes
SHA-256: e8d73ef5af9d2b3f9935aeb0be0dce00b3a6852542dee4118d1ed0e79f294b52
font_01_sfnt_off0000f5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 11376 bytes
SHA-256: c53387bca4993171572019bfa60181231e32c7dad51abcd6265991c235caaec9

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