Malicious PDF — malware analysis report

Static analysis result for SHA-256 905c87bde3ee7af6…

MALICIOUS

PDF

70.1 KB Created: 2021-04-08 06:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c500fca6812a78821537ab7e32a808ed SHA-1: 1d24ebd896cc2a6f93bdb6dd6988e45d989f86ab SHA-256: 905c87bde3ee7af66d5674e71763e277942841a8123ecae4d780c861af348650
126 Risk Score

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://jumiwimov.ru/123?utm_term=gta+3+cleo+mods+android+no+root PDF link annotation
    • https://mamonaxerif.weebly.com/uploads/1/3/5/3/135347384/8290928.pdfIn PDF document text
    • https://fexiragija.weebly.com/uploads/1/3/1/4/131409693/2160001.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/RheOveH/19209610229.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/93621827922.pdfIn PDF document text
    • https://gikenizebos.weebly.com/uploads/1/3/4/7/134706738/vetowirif-kikuvidawifiwa-tesata-dagaj.pdfIn PDF document text
    • https://cdn.sqhk.co/puvijupem/ifha8l1/worldbox_god_simulator_pc_download.pdfIn PDF document text
    • http://max-lifting.store/61215836474g2uhl.pdfIn PDF document text
    • https://bazulerijodinib.weebly.com/uploads/1/3/1/8/131856415/216756.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/nilabotexoziresi.pdfIn PDF document text
    • http://nariwunuzaw.scienceontheweb.net/adobe_pack_plan.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/xokoranogitiboxep.pdfIn PDF document text
    • http://lofitner.buzz/bewuzunosasozageji8qech.pdfIn PDF document text
    • https://luralaxigagu.weebly.com/uploads/1/3/4/8/134868525/xiguti.pdfIn PDF document text
    • https://moxalabukeziro.weebly.com/uploads/1/3/4/7/134772199/bokewimuriser.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/dupematugejowabiweripo.pdfIn PDF document text
    • https://xibijogoxedugo.weebly.com/uploads/1/3/4/6/134662411/1725870.pdfIn PDF document text
    • http://baby-slings.ru/wixoridiee3ht.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/REzxnaK/16734252348.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xujided.onlinewebshop.net/paranoid_personality_disorders.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_off0000d46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46F 5280 bytes
SHA-256: fb32fafe6b15d68b9175d49b73dc2f7a5ef357a583d26ec784136245f722914e
font_01_sfnt_off0000e64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64E 11152 bytes
SHA-256: c24af79cc3459aa0b825a1a7e1d5bf6442661a9ebe25e6f97e53252e5243a302