Malicious PDF — malware analysis report

Static analysis result for SHA-256 e060deb2f2af0c62…

MALICIOUS

PDF

91.8 KB Created: 2021-04-06 13:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2f70bfb222b3a43da0d48826533307b0 SHA-1: e94672eb3dba9282a3568fd4bee11c799dfdd3cd SHA-256: e060deb2f2af0c62ba0efdad14c1860fe777a37bfdc9526bbe6baeb224843a6f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV also detecting it as Pdf.Phishing.Trojan. The file contains a link farm with numerous external links, including one to 'https://vilenefex.ru/strik?utm_term=samsung+tv+remote+restart', suggesting a phishing or redirection attempt. The presence of embedded URLs and the overall structure indicate it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://vilenefex.ru/strik?utm_term=samsung+tv+remote+restart PDF link annotation
    • https://tiledumojamusej.weebly.com/uploads/1/3/4/0/134096308/6676271.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384167/normal_6006e969a82cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_6061a3982abf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_601b31b46be97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_6029313a27244.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/modo_de_produccin_de_la_comunidad_primitiva.pdfIn PDF document text
    • https://lelebozo.weebly.com/uploads/1/3/4/5/134578107/wukevaxoni.pdfIn PDF document text
    • https://xokejajolaliz.weebly.com/uploads/1/3/4/7/134718337/5840450.pdfIn PDF document text
    • https://waseralubireg.weebly.com/uploads/1/3/4/6/134622629/dfce1e2c.pdfIn PDF document text
    • https://japafapu.weebly.com/uploads/1/3/1/4/131437770/1d15993c6306.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369626/normal_5fe07ce7c65fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_7bf6fd26c75147a594c26777131d748d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e4c107-3890-44dd-bdf0-b3cf8e65dc73/28836616225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c759d78-71b2-4504-ad4f-a599b86be744/.pdfIn PDF document text
    • https://de26864d-dd79-4a6d-8467-b5cf435a6969.filesusr.com/ugd/6ff07c_add0282e8e2449cc831242bfa4155955.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba4ccfa-33e5-4f9d-a4fa-67c6defd87e8/1904357633.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/29333871700.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_9a704701f80f47f984ce9dc44b46e57a.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_df6ef1024165461c97f74e15c9854684.pdf?index=trueIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_629702c4bad044f89a45027a80e74855.pdf?index=trueIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_a39fb9a66a4e4f8eb3285a3b0b5dabfa.pdf?index=trueIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_c2858938f6734638a74a765daffac74f.pdf?index=trueIn PDF document text
    • http://xefiposokupama.myartsonline.com/converting_to_word_document_free_software.pdfIn PDF document text
    • http://gixufedexakav.atwebpages.com/12_acuerdos_de_paz_en_guatemala.pdfIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_314b26bc5511475c8e62b1c20bcf9172.pdf?index=trueIn PDF document text
    • https://80cb706b-a9cc-40e6-9cd2-ad5688d6c4a8.filesusr.com/ugd/c84a73_f249a5c25f3f4ec0973629e90b344822.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000143c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x143C6 18244 bytes
SHA-256: c9b75c8895836336d83b42cf882bba31e2f4bb5f2f48d6990197ceafac2f249f
font_00_sfnt_off00010bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF9 5136 bytes
SHA-256: 9448dbca02e5b3af6f428cc5d2e727bce1c5e702ceca8cb7d2789d11b45addb0
font_01_sfnt_off00011d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D62 11204 bytes
SHA-256: 82edce572b5d0c17c777935960c8e45ef909263c503a90a8cb4b8d493f1fe027

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