Malicious PDF — malware analysis report

Static analysis result for SHA-256 88984849a7622454…

MALICIOUS

PDF

72.2 KB Created: 2021-03-03 20:30:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1789b3219f8be8425c8fc8f13a86b0bb SHA-1: 0d66bef913d585be7d0008e96affb78c52d00edf SHA-256: 88984849a7622454accfbcee526628b1b65f50ef59ad18b6af9cb87f7d802f36
186 Risk Score

Malware Insights

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

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 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://jumiwimov.ru/strik?utm_term=the+theory+of+moral+sentiments+citation PDF link annotation
    • https://midubumiw.weebly.com/uploads/1/3/5/9/135989619/valagafoxoko.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesijoja/ieohLgj/11620366705.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/fungf6R/25247911226.pdfIn PDF document text
    • http://gigurokubi.66ghz.com/how_to_fix_kitchenaid_blender.pdfIn PDF document text
    • https://cdn.sqhk.co/bufudoraxala/5D2jhIW/85324584791.pdfIn PDF document text
    • https://cdn.sqhk.co/senosekagoko/Fihific/puritivurelazugo.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/3hgjcja/the_trip_1967_full_movie_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/hbjadi0/playstation_1_emulator_for_android_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/2GI6pN7/12610087284.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/54546203303.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/biaihD7/dungeon_chronicle_mod_apk_ruby.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/uKNwged/runescape_grand_exchange_bond.pdfIn PDF document text
    • http://maroron.22web.org/cpr_guidelines_2020.pdfIn PDF document text
    • http://wasatosu.sportsontheweb.net/philips_universal_remote_codes_for_sanyo_tv_4_digits.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/Oiiclhj/wood_project_ideas_for_gifts.pdfIn PDF document text
    • http://ramubananene.iblogger.org/resivoxonosowalix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://givonomiruf.rf.gd/bait_3d_full_movie.pdfIn PDF document text
    • http://tupazovux.epizy.com/players_handbook_dnd_5e_items.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

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_off0000dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 5172 bytes
SHA-256: 0fcfffe85d1d435e1facafeb60dca2fa221c1d59ba4ee2ce6582195ef7e32597
font_01_sfnt_off0000ee43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 10732 bytes
SHA-256: 83e2fdff71d83652f5efb53dbfc2d34ec0fe9918cd1846199ebf3482d1c2d79f

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