Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ee85f2d93eb089…

MALICIOUS

PDF

84.7 KB Created: 2021-05-06 02:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ff1ec5b7b5a4994590d777017de0fa78 SHA-1: 7120d52a42e5a68390e489d5e293d183db48baf4 SHA-256: 34ee85f2d93eb089364f92b3431a444753b8ff41662c209bf936b1fb5e963e19
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 0.9997

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://golowaki.ru/strik?utm_term=evenflo+convertible+car+seat+green PDF link annotation
    • https://cdn.sqhk.co/fivufotimad/jgii35R/power_wheel_hoverboard_reviews.pdfIn PDF document text
    • http://power-guard.shop/navy_mental_health_evaluation_instructionzo82t.pdfIn PDF document text
    • https://cdn.sqhk.co/vekepafate/xjhQ1ic/blacklist_season_5_episode_guide_tv._com.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/Ojjruia/texadipegevegorenupipex.pdfIn PDF document text
    • http://itravelgr.com/55518630948ebvdw.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/hgieOgf/ea_sports_ufc_2_ps3_iso.pdfIn PDF document text
    • https://cdn.sqhk.co/rixazezozo/aieyjhQ/facebook_lite_messenger_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/fHhjhhn/dune_battle_pug.pdfIn PDF document text
    • https://cdn.sqhk.co/jipodipotaj/wemupjd/1563625833.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/WOVihjd/cops_n_robbers_2_mod_skins.pdfIn PDF document text
    • http://getdouche.xyz/37438606834fuqm8.pdfIn PDF document text
    • http://tamakar.tech/88431696825qsueb.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/oYokidT/had_a_bad_day_at_work_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/vg99Qhb/sojotilox.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/E8jijgc/granny_barbie_mod_texture_download.pdfIn PDF document text
    • http://segwaywheelchair.ru/151129850470zgni.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/jegche6/the_king_of_chess.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_f9f3e8d9cebc47cfaaf1f1e1c8162563.pdf?index=trueIn PDF document text
    • https://c1ab63b4-4781-4901-abeb-f581ed41d26f.filesusr.com/ugd/b44917_c5ff79302caa40f7b4c3b1ebf880df81.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_d14077b8efe446dbb5b80c42e2870317.pdf?index=trueIn PDF document text
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_0d32526e929148eab8ccfc97b373296a.pdf?index=trueIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_ecb7ee04c0dc4495a013c457ec242e57.pdf?index=trueIn 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_off00010c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7A 5204 bytes
SHA-256: 500e7fb13abec102788387075217a337e6a580de25c7ea1beb1d5170d9c9c435
font_01_sfnt_off00011e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E52 11664 bytes
SHA-256: 2c0afffa9d2df9f9a94d2f9daddb2cf228658e7386a1f914ee84f9fedbe1a5a8

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