Malicious PDF — malware analysis report

Static analysis result for SHA-256 999a60cffca08ff0…

MALICIOUS

PDF

76.9 KB Created: 2021-03-28 13:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 028afde298fe5f15b3d23f30d2a8ca75 SHA-1: db70ece838f16234f885c4d23ed465fae4a1baf8 SHA-256: 999a60cffca08ff00585bb8c06915d11ca44945fcc3afa55608b9230b4de00ab
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a mower manual, suggesting a lure. The presence of numerous external links, with one identified as a potential phishing URL, indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=ariens+17.5+hp+riding+mower+owner%2527s+manual
    • https://static.s123-cdn-static.com/uploads/4474222/normal_60063557c6e71.pdf
    • https://cdn-cms.f-static.net/uploads/4380680/normal_6041fddedae56.pdf
    • https://cdn-cms.f-static.net/uploads/4489983/normal_60257c276bb7d.pdf
    • https://cdn-cms.f-static.net/uploads/4471455/normal_6047017780294.pdf
    • https://cdn-cms.f-static.net/uploads/4482405/normal_5fd1df4ebef5a.pdf
    • https://cdn-cms.f-static.net/uploads/4462066/normal_603f9c942dd22.pdf
    • https://static.s123-cdn-static.com/uploads/4403266/normal_6005770d43364.pdf
    • https://static.s123-cdn-static.com/uploads/4451756/normal_6003cff3cfa56.pdf
    • http://xuxevifitadizer.iblogger.org/15876641615.pdf
    • https://cdn-cms.f-static.net/uploads/4451561/normal_5fd0d3c66295f.pdf
    • https://cdn-cms.f-static.net/uploads/4467325/normal_600b4ad0f26ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_4fd1d3dda18a484fb7d20a4fab9a9248.pdf?index=true
    • http://femasusatatovet.epizy.com/apiezon_n_grease_datasheet.pdf
    • http://lufuzefaz.epizy.com/bowab.pdf
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_78a08c7e531c4d3db9ae08ac3f0a4398.pdf?index=true
    • http://batopodati.epizy.com/serie_after_livro_5.pdf
    • http://taxupot.rf.gd/rolusasamigidesodunu.pdf
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_fcdcd6b19ac7482089eeda7baae69229.pdf?index=true
    • http://vezuxafafifobo.epizy.com/webibutuwapetusi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb1.bin
1ee7448effa7787bc260182e5bb50964bb67f7f5b1931e2b4b76ce194ba845d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 5776 bytes
font_01_sfnt_off00010165.bin
f81443c21971053cf2d644b0c0838bf4a72ec189be4aacb638d19bc2283e6cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10165 10760 bytes

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