Malicious PDF — malware analysis report

Static analysis result for SHA-256 8333bbeaceabbbaa…

MALICIOUS

PDF

70.7 KB Created: 2021-03-06 08:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1e11dbf47ac95b1c81af0c6fe602f292 SHA-1: a96cd5d56bfde702caa19596f2c28d0b97f6d010 SHA-256: 8333bbeaceabbbaa10bebac2190cda9d99f4fb0e44ee1bb2ce12c4875befe45c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. One of the extracted URLs, https://ponafet.ru/award?keyword=bryant+plus+90+350mav+igniter, is directly associated with the PDF's content, indicating a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/award?keyword=bryant+plus+90+350mav+igniter PDF link annotation
    • https://sozazajigosana.weebly.com/uploads/1/3/0/7/130739782/nezebuzimaf_pegamilu.pdfIn PDF document text
    • http://healthit.space/sodezowofubalimukovufoj7tww.pdfIn PDF document text
    • http://foyou.store/pensamiento_critico_autoressljrg.pdfIn PDF document text
    • https://xozavefo.weebly.com/uploads/1/3/4/0/134018900/6205276.pdfIn PDF document text
    • https://filudatobo.weebly.com/uploads/1/3/2/6/132681654/sevuxarim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_2e635c3d7aa54aedbb1166bc7a4b4e15.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb23e4d-e66a-4614-9a8c-36f03444287f/arduino_uno_r3_super_starter_kit_tutorial.pdfIn PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_6572774db561496cadeed93a8c11643f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levovod/47244262466.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_4565b22429b24f9a8f4adbfbed4cbf71.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_020f808f787840b0ba1a560068eea392.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/bhakti_song_bhojpuri_video.pdfIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_6fc001220d14456abf1a303e82ef9ca5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a508d91d-9ee7-42a8-a06d-781dbe82b675/halo_bassinest_swivel_sleeper_wont_turn_on.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_9fcec028c72c40d096e8f9dfb2ad33c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/bildschirm_sperren_android.pdfIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_780de34a314947969d16ee9a2728b3d3.pdf?index=trueIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_4d65658239e64b728bdf55358a82b2bb.pdf?index=trueIn PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_7b4ad2362c2541348bc4d6c9f17d0dba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6861584-93d4-46cd-8c4b-cb678aa34e61/fafovolekebudiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c234d5b-cb33-43a4-b2a3-9c48312703ee/how_to_calligraphy_pen_and_ink.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/79269977312.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_off0000d3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FA 5936 bytes
SHA-256: 325de64bce9bf5c93906ade0e5c5fea7d9a1f42756741edf75f5dccc2d4c9397
font_01_sfnt_off0000e821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 10328 bytes
SHA-256: 0a946e684830f94fc080336b3478bef79a94a76b830669c2dec70efe1dbcbe0f

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