Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05293193c66d61a…

MALICIOUS

PDF

80.0 KB Created: 2021-05-01 17:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 493c6eade7f06fefb969d1d7e972042d SHA-1: 199d91b30252e86a8c237a33135dd2e035d2c677 SHA-256: e05293193c66d61ae9a2dac0e4fe700ae71540c9e3a9c177fe8214be98c60ab1
186 Risk Score

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 0.9998

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://kuzutuzo.ru/strik?utm_term=is+fl+studio+good+for+vocals PDF link annotation
    • http://bomepufibawil.scienceontheweb.net/charles_shirley_jackson_sparknotes.pdfIn PDF document text
    • http://belepebo.mywebcommunity.org/biochemistry_download_agrimoon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_60473af37afbe.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/vakisulavanuk.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/GXhggha/monster_shooter_platinum_edition.pdfIn PDF document text
    • https://jimagofer.weebly.com/uploads/1/3/0/8/130813953/ee96a15ea63c.pdfIn PDF document text
    • https://kikuvutu.weebly.com/uploads/1/3/5/9/135965216/kexemigov_fazelobano_lizow_zupofudox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_6015ee30adbcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_602855465d427.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/DZijhc1/36073686829.pdfIn PDF document text
    • https://dogixosewe.weebly.com/uploads/1/3/4/6/134633635/nopejofa.pdfIn PDF document text
    • https://cdn.sqhk.co/fekuseguxe/RiaCFV5/dekotemudekefovuki.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/d7jhZid/4562335875.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/hcQdhTA/cafeland_world_kitchen_celebrities_favorite_food_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9772d289-d5fd-4201-b3de-d23bac6d2873/72233330721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a92855-94c5-493f-af58-33c38af212c1/how_do_you_describe_summary_statistics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf8f84b-9e28-441a-bade-a167e7ed62d7/wutelevinoluvufegijetige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3454ccb8-4ed7-4e57-8d11-a9363b9aae82/84029043744.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/dudawiweverataxikizuzokux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8eea18-7a9e-4a34-b39f-d54d71d7f0e1/how_will_you_measure_your_life_book_review.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_off0000fb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2D 5184 bytes
SHA-256: 1c434cd5752601aefee04b4c05bdbfe64075e04397f78ebb5f25b4ea616e49b7
font_01_sfnt_off00010cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 11128 bytes
SHA-256: 707faecbe983c09ea5ea69b5dc243db64a1a14e63c70df2e669fd5387cbdfe52