Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc17adc4963d625e…

MALICIOUS

PDF

88.7 KB Created: 2021-03-01 23:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 05dea485ec422ec96590f9d0c95a6fea SHA-1: 99c131e68fc1927306b96ec8576be4880ff69ee0 SHA-256: dc17adc4963d625eb18bb22c08fdd1574c6987958800d8923724d07a62b66593
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to redirect users to malicious content. The document body, though obfuscated, appears to be a lure related to operating instructions.

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://druttle.ru/strik?utm_term=hoover+steamvac+carpet+cleaner+operating+instructions PDF link annotation
    • https://wikafifej.weebly.com/uploads/1/3/2/8/132815388/2f272.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/codigo_de_error_netflix_m7353.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/hagifjj/walking_dead_cast_season_6_episode_4.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/gYGhggh/fallout_4_settlers_better_weapons.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/how_to_connect_soundlogic_headphones.pdfIn PDF document text
    • https://daxivikulogator.weebly.com/uploads/1/3/4/3/134308382/a9637654c603ea.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/what_is_convert_mode_in_whirlpool_refrigerator.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/82828812478.pdfIn PDF document text
    • http://mekomob.getenjoyment.net/how_to_play_cyberpunk_2077_on_ps4_early.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/G9ginhd/65158962409.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/hgKVtUZ/juegos_de_stickman_dismounting_gameplay.pdfIn PDF document text
    • https://dezazobe.weebly.com/uploads/1/3/4/7/134755526/de2a3271d54338.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/vuxirefare/google_driverless_car_report.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/what_is_the_difference_between_systematic_review_and_integrative_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/51037648147.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/bukexerexejib.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/24781442841.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_off00011def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEF 5272 bytes
SHA-256: a180dd18ca095b39457646df5d9e46883d367e3902c550bb9ed450c653ed1fe8
font_01_sfnt_off00012fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCE 10952 bytes
SHA-256: 75e8e4fd5a171190ac99a757cc7124536e7ace6af36ec0891adef061018a4130

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