Malicious PDF — malware analysis report

Static analysis result for SHA-256 9570235fb88ff302…

MALICIOUS

PDF

82.2 KB Created: 2021-03-23 03:03:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 764f5c732f05263aaf2c445f6e72aaad SHA-1: c94f23544ba3fcfa71246caf3577352d8181aca2 SHA-256: 9570235fb88ff3022f42ebf63f961bde30b492d3eb46b3291794dfcd551af145
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=business+model+innovation+in+entrepreneurship+pdf PDF link annotation
    • http://kunewalijaxuna.getenjoyment.net/3972514875.pdfIn PDF document text
    • http://noxaduva.mypressonline.com/design_of_rcc_and_steel_structures_notes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376599/normal_5ffdf30f31e2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491705/normal_602207cf6d71a.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/zevulajutof.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/hjjigN2/gauss_meter_vs_magnetometer.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/79702610849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_6025ae351d60d.pdfIn PDF document text
    • http://jigikujed.scienceontheweb.net/depexozerin.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483359/normal_5fd6e05c8f94c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369656/normal_5ffa4ef54c9bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408701/normal_60340c664c366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479916/normal_5fd734deea661.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/jejomanunamokupesad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389361/normal_5ff54d14aacac.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuzasana/h0ghTge/tumblr_iphone_wallpaper_yellow.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/ieSgiCB/altamira_press_10_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10271 5392 bytes
SHA-256: f0e8feaa3a52e1fb8e16d4598ed03133fe6ddff7f9bc4ea41e27c507e685dd6d
font_01_sfnt_off000114a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A1 11984 bytes
SHA-256: d5f1d4a3077a1998ef63708fc128e10b980e5c5386f58dee5154779e9854775a

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