Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e5f2c98f778bee…

MALICIOUS

PDF

97.4 KB Created: 2021-04-04 10:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: de9f85fbfd5aa8728db1b04b105f5077 SHA-1: e621694afbcd53e88d44a8210f80f06a995eb3d6 SHA-256: 93e5f2c98f778beee1c4e9c5a70314c8fe0637d075f86e826e839e2cf0ee3d84
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=six+flags+discovery+kingdom+map+pdf PDF link annotation
    • https://cdn.sqhk.co/mifigatira/geyMiiJ/zombie_survival_wasteland_mod_unlimited.pdfIn PDF document text
    • http://lnstagramoriginal.com/gatufovirdfyea.pdfIn PDF document text
    • http://pirunumilusarib.sportsontheweb.net/airman_y_group_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/yiijcje/bakagozanofutibixaxovud.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/ZhbhgSG/instant_followers_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/xgejb2d/siren_head_horror_sound_jumpscare_meme_soundboard.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/mabeduzefubakugixsdhxs.pdfIn PDF document text
    • http://fuxezaboxekave.scienceontheweb.net/tatalaksana_atresia_esofagus.pdfIn PDF document text
    • http://pedrons.space/71838229455a9aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_601b4242e556f.pdfIn PDF document text
    • http://frontglass.xyz/machine_transformation_carton_ondul_ouedkniss1say1.pdfIn PDF document text
    • http://zosazufinur.mygamesonline.org/32937009781.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/fwhiiiY/lonuselekexofakesum.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/2Kjghc4/kpop_music_sheet_download_free_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/zetewexuve/jtkjdji/who_moved_my_cheese_audio_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_60167de8501a5.pdfIn PDF document text
    • https://cdn.sqhk.co/takoxuwal/a6pTgc5/minecraft_2020_mob_vote_twitter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wegugus/crain_s_chicago_healthcare_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/25701516107.pdfIn PDF document text
    • http://dexivovadoxexo.myartsonline.com/uptet_answer_key_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC5 5580 bytes
SHA-256: 4179086d99b3d12287a5924e4a22c66fa7528eed78baf3ef2a081543b91b1a1f
font_01_sfnt_off000141a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A6 11860 bytes
SHA-256: 632c57adce8cda060c3b2d07cb2f5d4302e8cdba3a47bc510179f505f55b04c0
font_02_sfnt_off000169c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169C3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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