Malicious PDF — malware analysis report

Static analysis result for SHA-256 edaa33ee039e1539…

MALICIOUS

PDF

78.9 KB Created: 2021-01-27 23:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 94c1753ea54625b9a6d1d08366cc0fea SHA-1: d5d6aabf0d022b88084273d95b110873cc2e6dc5 SHA-256: edaa33ee039e1539b54493b0b55c6cc71dc4a0de295a8166f1a63efad53ed95d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Animal Farm', likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=animal+farm+chapter+2+study+guide+answer+key PDF link annotation
    • http://carluxepaint.site/beerbongs_and_bentleys_torrent92lw4.pdfIn PDF document text
    • http://itawegan.space/30_seconds_whatsapp_status_video_download_2018_punjabitbx6y.pdfIn PDF document text
    • http://yognat.space/jasinipogeren4m0c.pdfIn PDF document text
    • http://levelupguild.com/10136783598pr313.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478430/normal_5ff2aff0b6279.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/ojhzvhd/zombicide_tactics_shotguns_wiki.pdfIn PDF document text
    • http://sberbank.services/zaseftrnr9.pdfIn PDF document text
    • http://scriptbook.xyz/jexatapanowumexfbf7n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5ff4b97d61f6a.pdfIn PDF document text
    • http://acgmgroup.ru/acellus_academy_student_sign_ingsw6i.pdfIn PDF document text
    • http://shop-onlain.fun/snake_worm_offline_zone_downloadbi7e8.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/fcicfjd/tactical_war_tower_defence_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/okUpqij/highwaymen_paintings_florida.pdfIn PDF document text
    • http://teenagetutor.online/ultimate_steel_robot_fighting_hackknt8x.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/WjfDhgm/photo_collage_art_app_free_download.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/zurovajij/invision_studio_iphone_x_template.pdfIn PDF document text
    • http://livugaxoretedop.epizy.com/nuwedini.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/sekulobururelul.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/29922318060.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_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 5948 bytes
SHA-256: 58b08e3bd8b9118cae2f893eecf58a2d69eab281ffd8b4e9d1b9b6bf4c0f2e80
font_01_sfnt_off00010c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C03 10140 bytes
SHA-256: 1c933f211e6813a216c112a3bef023158ab82ebec0841cda2caa151c4e5d45ac

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