Malicious PDF — malware analysis report

Static analysis result for SHA-256 f902da07262ea9bf…

MALICIOUS

PDF

75.4 KB Created: 2021-02-28 07:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cccabe8c911e0aa8c9c5c73c756ab797 SHA-1: 5da17acb409f96279b85d85973ce90bc80c99dbe SHA-256: f902da07262ea9bf14713ded97ed1c41f6332259fec314a8442346ef44e4850e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=major+barbara+short+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478123/normal_60184cfe6d4d2.pdfIn PDF document text
    • https://cdn.sqhk.co/rogudokives/iiWhary/zombies_full_movie_disney_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vebiziwob/W4qPQUg/f1_schedule_2016_japan_qualifying.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_6018ee5ee87f2.pdfIn PDF document text
    • https://cdn.sqhk.co/sudizatase/BPijNcc/xamodotit.pdfIn PDF document text
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/dc1fa2437211bb.pdfIn PDF document text
    • http://topemuliras.22web.org/36767775370.pdfIn PDF document text
    • https://dexigator.weebly.com/uploads/1/3/6/0/136049715/dizavovifuvisawetafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499942/normal_5fdc7066d8f47.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/bjgx2hi/doodle_jump_unblocked_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370265/normal_5fe0a640166dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387417/normal_5fcef79861f60.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/hjcmaSY/interlocked_hands_logo.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/pifjexC/lujesiwidanopiduwu.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/Ilijgj4/baby_yoda_merch_gamestop.pdfIn PDF document text
    • https://danaguvofuboxi.weebly.com/uploads/1/3/5/4/135401293/rebisonuxunov_nopisogidadojet_zujibibal_nalirem.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/3JwzxDL/nemuwomunirodumazurizok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426699/normal_5fc749b9a6729.pdfIn PDF document text
    • https://bokonipazesokut.weebly.com/uploads/1/3/1/3/131398478/fudelunulik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jewukibasevot.rf.gd/captain_america_shield_images.pdfIn PDF document text
    • http://totiwofosu.epizy.com/boomer_sooner_sheet_music_for_clarinet.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_off0000ea03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA03 5216 bytes
SHA-256: c3e72d6dcc7f466c71071d571caa8b152389dca4bb750b8ef23d64778003c34d
font_01_sfnt_off0000fbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 10780 bytes
SHA-256: 0106e512f5cb8cd2d9b37b93afa5c6a16b8ce33f3f1e0cced446dd33f0985177

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