Malicious PDF — malware analysis report

Static analysis result for SHA-256 f807348cec12d0de…

MALICIOUS

PDF

75.7 KB Created: 2021-03-16 07:06:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e81999e1848954b31cc9d1082bd0e1ce SHA-1: 2adce80acf7a2be45b7d349f293b275a1cfeec82 SHA-256: f807348cec12d0dec9beb08756f8c9c42a61b492472534543ecef12f093fd64b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=does+big+nate+have+a+show PDF link annotation
    • https://cdn.sqhk.co/takejirasomu/hgpdR4v/wumagakozotiv.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/bemipojobaj.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/gc9jigf/pixozuref.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/stillwater_ok_drivers_license_testing.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/hhwhbi3/in_god_we_trust_lyrics_meek_mill.pdfIn PDF document text
    • http://gawudubigojan.getenjoyment.net/thyroidectomy_surgery.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/gasexijevamodek.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/starting_out_with_java_from_control_structures_through_data_structures_4_e.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/jjgjgvH/26850337709.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/formation_of_public_limited_company.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/yhfMPsM/lejegigiwemigaxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0315d410-4255-45a3-9477-873949dd02ac.filesusr.com/ugd/f85006_3057939f52574199890c59dd4988ed78.pdf?index=trueIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_8f7c5052743a4a6bb08f523d27e558b7.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_d8f2c19c769a45e5a8d04a48d0dce3ba.pdf?index=trueIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_6a7a1c57e88d4e0e8f84fe59d77cff5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/41726614659.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_df663742f044479cabdc3fa3530785ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/tijufekuxonanaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/nufewebutenupokalade.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_off0000eb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4C 5108 bytes
SHA-256: 2ba66f4b11eb28b72e55ae06990c0a0589299a9507e1452793b748ca4711a001
font_01_sfnt_off0000fccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 10904 bytes
SHA-256: 4005ef073f57cae46410273b0cfb93290d43c39b8b93c9c200a2b7690a6dba8d

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