Malicious PDF — malware analysis report

Static analysis result for SHA-256 b134e15f5154179d…

MALICIOUS

PDF

74.0 KB Created: 2021-05-17 14:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6155fe602dc8311ec49ff0afa39ff67a SHA-1: 23a46d135f43c26e2a7a055084bfa681030ec7fa SHA-256: b134e15f5154179d2530ec28c1bbec9b45dfe4374dbc3f2f1cf8dadf3aa97c95
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous external links, one of which is associated with a 'scanner driver' lure. The PDF structure and its embedded links suggest an attempt to redirect users to malicious content, potentially for phishing 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://seumenha.ru/strik?utm_term=hp+officejet+4500+scanner+driver PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390659/normal_5fffba789f259.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/ntORVgi/open_world_games_like_gta_san_andreas.pdfIn PDF document text
    • https://cdn.sqhk.co/lifupowaseli/gBtHPgj/alembic_file_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5fdc1a63a82ea.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/yidILij/hachiko_book.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/jjEcaji/japuxuguzoxot.pdfIn PDF document text
    • https://cdn.sqhk.co/javufikari/hgOgfhe/xofogozemosuvumex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_1779f119e68945abbe2736985b350711.pdf?index=trueIn PDF document text
    • https://49884795-3b66-401c-adaf-b59e999553af.filesusr.com/ugd/8bd6c9_dce8450bf90648bfb080fdf6b18721cb.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_39b8cc2c2cdb4e2f8bb5e884a80ef763.pdf?index=trueIn PDF document text
    • http://niwerujegip.epizy.com/46805310727.pdfIn PDF document text
    • http://jisaxabajerofu.epizy.com/76506967958.pdfIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_3abab5a40d374a5fb575120ea830c064.pdf?index=trueIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_842329fd76ba4e89b83860afc827306a.pdf?index=trueIn PDF document text
    • http://putajamesar.rf.gd/tenimujoji.pdfIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_93b82eb35b604e0cbfa76fbafabc1278.pdf?index=trueIn PDF document text
    • http://wadagafek.rf.gd/credit_default_swap_explained.pdfIn PDF document text
    • http://xofunuxemijowex.rf.gd/90974138101.pdfIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_c30436eba56146179ffe604e11e82817.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_off0000def2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF2 5568 bytes
SHA-256: 2f5e2f4e3fae513336f1461f7a4ee80a1dba54ab1f117c69561f408d677ea6a0
font_01_sfnt_off0000f211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 12404 bytes
SHA-256: 4b2dc3511eaba60686f1a9fbe095e2cae7bfb868dae9e3c8b098679309e3c929

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