Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6663447d60a4a86…

MALICIOUS

PDF

76.3 KB Created: 2021-02-23 01:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 43641fd3f1c9259466e2a0c7f75800f2 SHA-1: 5539de588effbb3ed41f94f5cf684da34bd7543f SHA-256: e6663447d60a4a86cc7d3f4b610138e3a3fbdd1bc6dbe432ec53673bc713f49a
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains a keyword related to 'hack agario skins', indicating a lure to attract users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=hack+agario+skins PDF link annotation
    • https://cdn.sqhk.co/rowubuvuke/Dhgudid/tolufep.pdfIn PDF document text
    • https://tekofudarazot.weebly.com/uploads/1/3/1/3/131381521/bdf103f46745.pdfIn PDF document text
    • https://dujililapute.weebly.com/uploads/1/3/5/3/135347223/3776c99ccc5587.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/ogDMii2/wuked.pdfIn PDF document text
    • http://moitender.org/health_canada_canadian_drinking_water_quality_guidelinesnp5qd.pdfIn PDF document text
    • https://fekolulowezomo.weebly.com/uploads/1/3/4/5/134593542/bdfa3a073f.pdfIn PDF document text
    • https://gozowejikagigu.weebly.com/uploads/1/3/5/3/135345496/147123.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/fLjdjgT/kpop_piano_bts_tiles_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/hfKggia/ancient_battle_app.pdfIn PDF document text
    • http://artyom.guru/can_psychopaths_ever_feel_empathyeg9ct.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/hjgeijE/car_wash_movie_soundtrack.pdfIn PDF document text
    • http://usejus.club/716072266291j94c.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/1SieDic/kevorewakabotawepovedumuk.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/jfkpShg/coloring_book_online_games.pdfIn PDF document text
    • https://cdn.sqhk.co/kapimetavis/afVLGja/fight_virus_war_space_shooting_game_apk.pdfIn PDF document text
    • http://interstart.online/bsnl_plans_up_eastyb37g.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/ZhaIQjj/werexumekadowejeb.pdfIn PDF document text
    • http://helpverifedbadges.com/93102270813zcyjw.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/pulavokaxe/14649884263.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_off0000e80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80C 4960 bytes
SHA-256: 96e2c77accb02ada1df3aa1e58a96caeaf1863a81cf08ed5ef4c50c754c6d8b5
font_01_sfnt_off0000f8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FD 13692 bytes
SHA-256: ae18acf31cb6e99f48ea36bc99a2b64defbbf7e8da8f4eac4725abad70fc09ec

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