Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bc0efacb9289b3…

MALICIOUS

PDF

77.5 KB Created: 2021-03-16 22:30:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 50e968cbcf51b3887c054886c24db658 SHA-1: b76b2bf3c5c44890083ab028aaa650265e851911 SHA-256: 14bc0efacb9289b3dbee41a6ff85aef7e0d939f6e48302409a8185ab2a63db42
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains and potentially unrelated content, characteristic of a link farm used for SEO manipulation or to obscure malicious destinations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

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://gimoguvi.ru/wix?keyword=wheel+of+fortune+movie+quote+answers PDF link annotation
    • https://cdn.sqhk.co/mepapogivoma/higjgps/80_90_dance_music_hits_playlist.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/76139030104.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/cMjieji/chocolate_milkshake_recipe_without_milk.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/hg2ighe/offroad_g_class_2018_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/hhig0ey/98069452509.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/hie8igP/92975469372.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/icodk4P/zombie_derby_2_hacked_arcadeprehacks.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/jfOijiQ/best_multiplayer_switch_games_for_couples.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/bezegoluzose/mabubej.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/altova_xmlspy_2018_professional.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/16322620453.pdfIn PDF document text
    • http://vekamodadon.onlinewebshop.net/icao_annex_18_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c2d100-6b6b-4b36-9695-60ada3635e5f/do_dominos_employees_get_free_pizza.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/innocent_steps_movie_english_subtitles.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_6d8d95679e574754863976393c021b2c.pdf?index=trueIn PDF document text
    • http://jumepenitujox.atwebpages.com/pirutanoratufinupop.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_12bccb7529de4290821479ebb96e0b70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/dwarf_fortress_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9851abd4-788c-4691-9bd8-5ca9f8df16e0/wuxezaduwasaragave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a090c685-b70f-4a16-9464-b6580a672bb9/pinojuwanelavudosavonenof.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_off0000f177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF177 5300 bytes
SHA-256: 220cb99d9a6d212eef675ec6ffde938a611e5b0788c4d0315954bb3c6fffd7ef
font_01_sfnt_off0001036c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036C 10896 bytes
SHA-256: 43dca9c7ff3c914d6bb2e68e2380c94809f608513eacf8cf0902bf66b04322b8