Malicious PDF — malware analysis report

Static analysis result for SHA-256 482d23e181041146…

MALICIOUS

PDF

86.7 KB Created: 2021-04-04 03:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e4b3dae77d5afb4b3fc5bb3280b9e113 SHA-1: 709f5f7873f16efc82d0f40d79d10066e81a4765 SHA-256: 482d23e18104114600842e6745d8db73426df8a627dfa7cd4a6d68aa5db25759
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 0.9995

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://resalured.ru/strik?utm_term=what+is+the+biblical+difference+between+joy+and+happiness PDF link annotation
    • https://cdn.sqhk.co/ganidabizi/c1gf8P3/vojuxomepewolojowi.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/DW2xXhf/hidden_valley_road_colorado_springs_co_galvin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462730/normal_5fd3417d63a1e.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/geesgfi/sofiwuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500425/normal_6067a06a91554.pdfIn PDF document text
    • https://jepololazatozuj.weebly.com/uploads/1/3/4/6/134601538/wodilujerod-birijewepoliz-zeximekip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484997/normal_5fef9e22de467.pdfIn PDF document text
    • https://cdn.sqhk.co/ziloteduxemo/iWhhlic/6606198138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487641/normal_604b35ee8444a.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/hggjgpw/5169742896.pdfIn PDF document text
    • https://cdn.sqhk.co/vivokunavu/dj0X1Cx/nidusewuwugagetimik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502493/normal_5ff2f5b140a0e.pdfIn PDF document text
    • https://watuluvijigu.weebly.com/uploads/1/3/3/9/133997483/mesitixekiko.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/jcKicjb/steam_table_pans_walmart.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/lavurezulamone_lebazadarex_pitiv.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/gedimuta/arputha_theevu_tamil_movie_tamilrockers.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_b9e154335f8a4d5c844c0297dc2a71c0.pdf?index=trueIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_fef2d589b8b14fbe9b53caab2e7ecdbe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fapaga/gebijugegekonasur.pdfIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_0df8aff46b814f7696812a11520447a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/navy_seal_pistol_qualification_standards.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/sony_mini_dv_tapes_near_me.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_off00011376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11376 5664 bytes
SHA-256: 97a1d4207da5ba3d8c0b85e12f14d3be027e4d6eb3c1515f3b428d695fa3bc4b
font_01_sfnt_off000126d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D7 11172 bytes
SHA-256: b775aed01b3494aebd9def6e03dacf270e6de207ef5fbae1a23a87d81b981304