Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e2145a9b9bfb47…

MALICIOUS

PDF

83.6 KB Created: 2021-02-28 12:25:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3fe2fb43f4e77ca4f6e847c40c47ec84 SHA-1: 265847a9fc156315bb6e3aa813df4c38b274c210 SHA-256: 05e2145a9b9bfb47768e3d826aab6b93120d8a4158f95e24b01be7c216263e58
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it functions as a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics strongly suggest it is used to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=jeu+de+carte+a+3+alcool PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485313/normal_5fc71984a06a3.pdfIn PDF document text
    • http://uanews.website/rpcs3_skate_3_downloadgncwg.pdfIn PDF document text
    • https://dukuvurijo.weebly.com/uploads/1/3/4/5/134522813/7756950.pdfIn PDF document text
    • https://gawujura.weebly.com/uploads/1/3/5/3/135325150/8603573.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406787/normal_5ffff83fdea22.pdfIn PDF document text
    • https://bilobusi.weebly.com/uploads/1/3/4/8/134872308/fowamuwafolenekuvas.pdfIn PDF document text
    • http://fitness-ital.fun/what_cleanser_is_good_for_fungal_acnex3bhb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_6020c0da05b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_5fda488a4a057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_6014cef4900c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6025c18541ba9.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/drrghwu/26497228457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5fd72b216ce85.pdfIn PDF document text
    • https://cdn.sqhk.co/rujamuzizogo/gjigZYE/fidget_cube_3d_print.pdfIn PDF document text
    • https://dotomogef.weebly.com/uploads/1/3/4/7/134760479/3bb851d.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/jidagafinuxesu/80609876462.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/graph_paper_template_10x10.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A1 4908 bytes
SHA-256: de09d3785b4b890b630f4b1f9856053936cc8834caac2f9ab899f917981ef05e
font_01_sfnt_off0000f457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 3288 bytes
SHA-256: 562fe7532adeaee84b1d9ba7ba561a61a9483dc6c21e14c8faf001111036ff97
font_02_sfnt_off00010199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10199 12272 bytes
SHA-256: e6179abe1e2669efeba06d0fa00f12ffb67dfbcc3892179fce0ca799bda5d0c0
font_03_sfnt_off0001282f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282F 16704 bytes
SHA-256: 83eb4159ddb0bc7219529587934d795ac78efd8cd99695bba9e9d865e2b186de

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