Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ded4a2aa21aeb4…

MALICIOUS

PDF

85.9 KB Created: 2021-02-24 08:19:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 910fcd1edbf44b01430aea49da6d5f36 SHA-1: 9894b77628af8d9a1d9dde5704760a8b92e86681 SHA-256: c6ded4a2aa21aeb4fa02a5e29f899ac2250e6f8b679c438900c3d94ff18db2fe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to disguise malicious content within a link farm, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=medical+billing+and+coding+for+dummies+pdf+download PDF link annotation
    • http://trixy-matrix.space/y_si_quedamos_como_amigos_librodbvn0.pdfIn PDF document text
    • http://beautysale.site/plotting_points_4_quadrants_worksheetcrtjy.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/ogchejd/zombie_road_racing_mod_apk_money.pdfIn PDF document text
    • https://cdn.sqhk.co/disanefamu/rjggjia/secret_of_mana_snes_classic.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/20251287469q4r4w.pdfIn PDF document text
    • http://janurikemodowu.iblogger.org/gazezo.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/Y0yPCia/88568391431.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/ifghdcF/detox_juice_recipes_for_belly_fat.pdfIn PDF document text
    • http://fabulouss.space/piwixerenedisimawerikuphs79.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/gjfGjgs/82048152889.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/gijjcgj/angry_shark_attack_simulator_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/8eCVogf/videofx_music_video_maker_apk_pro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wajiletum.epizy.com/66497772624.pdfIn PDF document text
    • http://mabofikoparu.epizy.com/31287351901.pdfIn PDF document text
    • http://pesetez.rf.gd/spanish_english_book_of_common_prayer.pdfIn PDF document text
    • http://dutataratoboruj.rf.gd/ausgeprgte_spondylosis_deformans_der_bws.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_off00011032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11032 5712 bytes
SHA-256: 5f53f0d9efbf9e203034cffa321406e320538e2a382c870d372abc63ff60e671
font_01_sfnt_off000123a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A3 11240 bytes
SHA-256: 5fdb6d0aec3fde989a2c81c7eb5faf22269c39d778d76ed9cc852bfd1dc7b5bd

Open this report in the interactive analyzer, or submit your own file for analysis.