Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e31e4024c6a1b67…

MALICIOUS

PDF

77.7 KB Created: 2021-04-02 05:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a327931442d07d8467910f15ded3eec9 SHA-1: ccbc5f719a07624a810d7ae7bc6ad8800131ff28 SHA-256: 7e31e4024c6a1b676088fb7b955c82131a429ab391301ede9a024c2e558d75d8
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 hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The presence of embedded URLs and the overall structure strongly suggest the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/wix?keyword=archetype+examples+in+romeo+and+juliet PDF link annotation
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/1477550.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/hhfkGe7/green_new_deal_farting_cows.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/3hhyXxa/dungeon_survivor_2_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_601d8b1f8c313.pdfIn PDF document text
    • https://rolemefusibo.weebly.com/uploads/1/3/0/8/130814279/568401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416136/normal_5fc923273675b.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/9707c5ecfeff61.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/WkehfZf/5_seconds_of_summer_2020_uk_tour.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_60367d4eefbd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376612/normal_5fffbe30aeed2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421939/normal_5fced9801c1aa.pdfIn PDF document text
    • http://pejagepelif.iblogger.org/7993303122.pdfIn PDF document text
    • https://cdn.sqhk.co/jipuxoxukul/KWfqji7/20318481382.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/YwgfgeQ/angry_gran_toss_hacked_unblocked_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482631/normal_5fd33a336e24a.pdfIn PDF document text
    • https://gapikedezasede.weebly.com/uploads/1/3/1/4/131438622/bugogivisopime_nazoxodojutip_verofak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530036/normal_604cf5e1d8e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_600cee9189df8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_6055749b2f0a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a803974-9e3a-468a-a96a-f2fe6416c9a2/52438892538.pdfIn PDF document text
    • http://vojakevid.epizy.com/wakum.pdfIn PDF document text
    • http://kajekolada.epizy.com/89531011779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973ee7fa-18b8-4af2-ac6d-4c70faae4e93/28405464296.pdfIn PDF document text
    • http://tenazapuxukov.epizy.com/autocad_trial_version_2007_free.pdfIn PDF document text
    • http://bubijijesaxo.epizy.com/eenadu_epaper_telugu_today_telangana_download.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_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 5548 bytes
SHA-256: 54193291ffbbb79b4973d28f48e1a8e046e39d6c4e5f9b8bd597c3bf6d0f9ca5
font_01_sfnt_off00010372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10372 11028 bytes
SHA-256: 0f4eb12c90cb398c8ce525df9bc958d9f7551b4eaeef6a45875015d1f1be6832