Malicious PDF — malware analysis report

Static analysis result for SHA-256 862e954fb6b1ca53…

MALICIOUS

PDF

84.0 KB Created: 2021-04-20 18:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bd82acf57d733bfad9521f48b689f751 SHA-1: dfdfe5456c9772d9166d370c212122253f918aff SHA-256: 862e954fb6b1ca53f303622f0458fb5aa604a6c14feeaf94933108ce3df27160
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 0.9995

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://seumenha.ru/strik?utm_term=how+to+fix+black+screen+on+toshiba+tv PDF link annotation
    • https://xuvolujib.weebly.com/uploads/1/3/4/3/134311221/6429864.pdfIn PDF document text
    • http://laulu-go.ru/what_is_social_science_research_ppt68nke.pdfIn PDF document text
    • http://thepropheticapp.com/rurebisilun7uxol.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/jicqgcZ/star_trek_fleet_command_ships_upgrade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_5fd0db7c96f3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424672/normal_60051f3975094.pdfIn PDF document text
    • https://guferewefozitak.weebly.com/uploads/1/3/4/3/134393558/meniz-parakimafo.pdfIn PDF document text
    • https://wuxavuzipirugud.weebly.com/uploads/1/3/4/0/134012349/biginelosologon.pdfIn PDF document text
    • http://kungfumalibu.com/how_to_clear_cfa_level_1rt8r2.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/hdCgi8L/dawuretawovawi.pdfIn PDF document text
    • http://getchambre.xyz/number_format_javascript_leading_zerofyae6.pdfIn PDF document text
    • http://antonioit.space/tekekamidelorasolenig6vvf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469623/normal_5fe5751b737e9.pdfIn PDF document text
    • https://fixelomutitag.weebly.com/uploads/1/3/4/3/134339240/1527320.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369901/normal_5fee78401acfe.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/42d75db.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/dhagfI0/15740531153.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/rokowibesukini.pdfIn PDF document text
    • https://cdn.sqhk.co/mizipudi/bOiiuhe/super_max_the_champion_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pogolo/candy_crush_saga_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/22049103610.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/does_cyberpunk_have_multiplayer_mode.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_off00010ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB6 5356 bytes
SHA-256: d5a8c96cf9f2b6539caccebf41ca3fcff435de6c308b0dc16cadb96697a1da1f
font_01_sfnt_off00011d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D01 10848 bytes
SHA-256: e1cdca78d4cccf9284575327fb77f98e5eeb327624ccbb44e3c354da9b08ac8e