Malicious PDF — malware analysis report

Static analysis result for SHA-256 e206b5cb92911b96…

MALICIOUS

PDF

72.7 KB Created: 2021-04-16 03:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0963cde11a4cdcbc3cf3eb0717139002 SHA-1: 563fa8e614b28f1b6a4759d24cb3bda717df00d4 SHA-256: e206b5cb92911b96932d4972b7312de4da71fa198378f689a6d5f17c4691f276
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with one prominent link pointing to 'https://botokaw.ru/strik'. This suggests a phishing or SEO manipulation attempt. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

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 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.
  • 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=when+we+pray+lyrics+tauren PDF link annotation
    • https://cdn.sqhk.co/lidupusumoj/W7iHoWv/sas_zombie_assault_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/FnjddrZ/gunudoxozisamejaguzeba.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/fUUhjgd/cisco_webex_meetings_sign_up.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/jolunenafobuw/81420789629.pdfIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_c3ecd29f39314888b65a576a94e1b889.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/melaleuca_cajuputi.pdfIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_17e7e6e41601410e9a112b83fe8669e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/97661649746.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/pec_exam_result_2018_marksheet.pdfIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_ebc88718dff042429770076aa83f0622.pdf?index=trueIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_4abed5eff5eb4f83adb5373e654b13ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a018c63-f40d-4309-8dbe-843d5eba11d2/lazirutifefokugagose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/188c9731-dabc-455c-8153-ae610c75b007/sepilisij.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_346658d557884e12a5a86d658b2ae8dc.pdf?index=trueIn PDF document text
    • https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_07a55eb564264cb7b05796f08d1c4bdd.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_e0a49d71b57f47df953bfc0ccd75e310.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_c87046af4e124bcaa442a82e82f108d7.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_off0000df43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF43 5228 bytes
SHA-256: 3dafd8363af0d8186ba18e0a6dd190ae0c4a6c85b52b3f50f08499c423b9c4a3
font_01_sfnt_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 10772 bytes
SHA-256: 5657ddcd2ed094bc6fddd62011dc787658d08d668667dacd435c4aa401191e32

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