Malicious PDF — malware analysis report

Static analysis result for SHA-256 6126d0f3c5645aa9…

MALICIOUS

PDF

72.7 KB Created: 2021-03-17 04:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ff45efd60d748547f0bb07dee7fe77d1 SHA-1: c0d485b5dff4d0eeb5d7b9e8beb2aaad659db811 SHA-256: 6126d0f3c5645aa9b2b93492f41885a099cf4577cb427a9cae44d4e9e8ee4d96
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses an invoice-themed lure. 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 0.9996

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?utm_term=how+to+become+a+referee+in+tennessee PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468827/normal_603af5fd0a3c9.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/3jigj5E/nuclear_strike_bomber_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/rufigukuj/R45HXJt/2_guns_movie_star_cast.pdfIn PDF document text
    • http://allostar.buzz/john_deere_l110_42_inch_mower_deck_belt_diagram71toy.pdfIn PDF document text
    • http://yildirimotobursa.com/review_buku_the_magic_rhonda_byrnexj08l.pdfIn PDF document text
    • http://peuly.xyz/little_red_hen_story_read_aloudhkesm.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jaXhihh/ligaxikepasimomeluvaf.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/Hvihhec/hitman_agent_47_game_cheats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465131/normal_5ffd7b46e2706.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/lights_out_2011.pdfIn PDF document text
    • http://nakotigolajeg.scienceontheweb.net/sample_data_analysis_in_qualitative_research.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421201/normal_603f08a1bd31c.pdfIn PDF document text
    • http://mebelintera.ru/65216743765vtevo.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/verugoxula.pdfIn PDF document text
    • http://jakiduve.scienceontheweb.net/electrolytes_for_electrochemical_supercapacitors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_5fdc2e85130d6.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/qXPid0i/21012532134.pdfIn PDF document text
    • http://7lessons.fun/920850293145pm0y.pdfIn PDF document text
    • http://geesecam.com/myers_briggs_personality_types_love_compatibilitytkfu7.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/bexalufavukekunub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duwemanuwixam.atwebpages.com/zimbabwe_national_anthem_lyrics.pdfIn PDF document text
    • http://gakajitaju.atwebpages.com/68379102795.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 7

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_off0000dd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD02 5188 bytes
SHA-256: 0f98684b232ea2c2978dc159081f39dc9d0bc4edbf9757dc78b6d7ef2619d92c
font_01_sfnt_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 11396 bytes
SHA-256: 2cef4c282a2a6a09a84401df5cffdb80e01f21ee02746a64057ada80470ab558

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