Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2af90c8f71ee70…

MALICIOUS

PDF

78.6 KB Created: 2021-04-25 00:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9a84078e0fc8f117e8e213fb5acfa377 SHA-1: 8742b47f30715cdd11fc5e83ed32bca1724b303d SHA-256: 2b2af90c8f71ee7071ea0838380f1aa4898c682ba535f1409eedc74108e73fda
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, disguised as an investment guide. It contains a significant number of external links, many pointing to disposable domains, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for credential harvesting or malware distribution.

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://mezovuduw.ru/strik?utm_term=how+to+invest+in+stocks+for+beginners+book PDF link annotation
    • http://ersoil.fun/41419710666n8abm.pdfIn PDF document text
    • https://cdn.sqhk.co/podidiwi/dIhfib5/jibugur.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/hjeMjid/mepujamomizetu.pdfIn PDF document text
    • https://cdn.sqhk.co/remozemot/D9pggij/english_song_download_mp3_pagalworld.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/hcgihiI/smith_s_near_me_hours.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/what_happened_with_marbury_vs_madisonb0vg5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_857e8c2f24684abcb6094ff6b390cd0b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6760a331-4968-42b0-be29-ac7a1659bcad/what_are_the_top_ten_stressors_in_life.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_6e9cd8359cea4664b0a9d8ade85f828b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapijifas/love_sad_boy_pic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf82862-8dd8-48d2-8b47-513a55d71c60/elements_of_design_line_in_fashion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/419c3c6c-ef4f-4131-bba5-bbbc1331d3c9/what_provisions_did_the_mexican_constitution_of_1917_include.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/lixuperunifisusafifulujel.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/kivizovagesoraw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b970ea15-972a-4d96-9b91-7a55e35b0f34/98735992116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a2e2b1-c975-4499-b2e5-7bba3e4b201a/how_do_you_connect_a_portable_dishwasher.pdfIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_b2afdb5893384d84911acd167879d6b6.pdf?index=trueIn 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_off0000f56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56C 5124 bytes
SHA-256: 027c3f63334e3594282bbaec523cc57c7c4e34accffa9cb2d9e3de3f44b0c369
font_01_sfnt_off00010710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10710 11292 bytes
SHA-256: 72fcf59d18ed9a42e6f628c6ca08394abb4cce5e1386d50bdf6f3f8ec9c2f62c

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