Malicious PDF — malware analysis report

Static analysis result for SHA-256 3501b4af60841f4f…

MALICIOUS

PDF

114.3 KB Created: 2021-04-04 07:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c42313420324da2bc0aa34c941307cff SHA-1: 87a41bc1a97190ce7baecc3f7e04b2d5804476db SHA-256: 3501b4af60841f4f68b6192e21e9c3d7310c1e5fefc01ab75c5c8f4589ca00fb
126 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm designed to redirect users to malicious URLs, specifically masquerading as a sports live TV app. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary malicious URL identified is https://xezojetit.ru/123?utm_term=dd+sports+live+tv+app.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/123?utm_term=dd+sports+live+tv+app
    • https://cdn.sqhk.co/nasubivapu/g3KhfeR/sarkar_infinite_mod_download.pdf
    • https://cdn.sqhk.co/fiporalisu/ajaU7hj/mac_dual_monitor_different_wallpaper.pdf
    • http://vidavubaxo.22web.org/90878057308.pdf
    • http://futajef.medianewsonline.com/biography_of_chinua_achebe.pdf
    • http://fibaxoxadomi.sportsontheweb.net/blue_eyes_technology_wikipedia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://034b020c-baab-45d1-b3ff-c950d21f9178.filesusr.com/ugd/3c93bc_935b905df0904f7a98bc3c592d1c0327.pdf?index=true
    • http://dulefuzobov.rf.gd/76740882036.pdf
    • https://uploads.strikinglycdn.com/files/70c0fbd0-1b03-4e9e-8d2f-585868f030f5/2000_jeep_grand_cherokee_laredo_engine_diagram.pdf
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_ede8ab8438014fd49546c2a15f483e05.pdf?index=true
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_9ed4a6fbd3d64004a6c378a73f6fabe7.pdf?index=true
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_c1e4e09177f345ef8faa252f93c5bf71.pdf?index=true
    • https://62bfe9e3-d01a-456c-9d14-3ac71290fd99.filesusr.com/ugd/cfe640_6bc5949cec3747e588ac3d16862ed1ec.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c6dc5c1f-ea2f-4da2-a977-c69ed30875d3/tesimig.pdf
    • https://d2d110b1-dce0-4b0c-bed7-be24280b7a6e.filesusr.com/ugd/165585_832719c70f4b4169b97e731cd7f45a97.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a38fafb4-3ccf-44ff-9218-6a5ea92afba1/35849331281.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015b3c.bin
f5a06ca329bd4edb70e7f1438498872972025c72a6326bb7ba87d32437f6dd80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B3C 4696 bytes
font_01_sfnt_off00016b4d.bin
8564b9db16568f0aa83e20628784845737496a0418ddae5d221fcb1766898192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B4D 12140 bytes
font_02_sfnt_off000194b3.bin
b41cc267550d8db7ba5defc9ced9147a44ea97248f7c94501bfc0f40ed45139a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194B3 17256 bytes
font_03_sfnt_off0001adab.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADAB 4324 bytes

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