Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c33f6a302eefce…

MALICIOUS

PDF

90.3 KB Created: 2021-03-22 04:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0405314502f5f10b998f786e425d5f0b SHA-1: 754aeae4f20dbb21c3b537e8e5d3600e26b117c4 SHA-256: 96c33f6a302eefce93c7d9f759bf460288a35e819bd10ad23f6274aa530eab0f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary suspicious URL pointing to 'dugedepap.ru'. Heuristics indicate this PDF is a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

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://dugedepap.ru/award?keyword=classification+of+conducting+polymers+pdf PDF link annotation
    • http://fusobilel.iblogger.org/dawin.pdfIn PDF document text
    • http://tivulaxovena.22web.org/libro_planeacion_estrategica_chiavenato_gratis.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/jarawaxanivu/xotuxixemafitoliwifozonif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b3bf231-bf96-4c98-afe7-48e35201a5e9/lawedumanuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90839134-8934-4a68-948d-759153046160/casio_wk-3000_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b6871f7-0cab-4a47-93f5-421a35711f5e/sears_diehard_gold_battery_charger_manual.pdfIn PDF document text
    • http://jogiweni.epizy.com/vampire_diaries_quotes_katherine.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_10fd627c705a442d82ec5eeda88c8113.pdf?index=trueIn PDF document text
    • http://dodemupisam.epizy.com/86044398301.pdfIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_c904e55a95af444290f6c3d7a4411e2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogijexu/industrial_training_report_acknowledgement_sample.pdfIn PDF document text
    • http://wusekugu.rf.gd/microsoft_corporate_social_responsibility_report_2017.pdfIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_d58d0e78f79b435a8deb5d055a05729c.pdf?index=trueIn PDF document text
    • http://wekazuvenasiwuf.epizy.com/nutritional_value_of_oyster_mushroom.pdfIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_225f8b4ba4b24041a354eb4c6a1885c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/savifin/nolimuligefakikofapipe.pdfIn PDF document text
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_bebebf73a3404851bfbc87e58cfc30e1.pdf?index=trueIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_a0e4385abfff46ab81926831ca0f8228.pdf?index=trueIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_5b433edcbb754456815c2cfd58a2bcc2.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_off0001212f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212F 5484 bytes
SHA-256: b7fc95a3d52e83a4b30ab5c238726160389c89f45904b4b1e4b1cd39e4a4a555
font_01_sfnt_off000133c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C6 12176 bytes
SHA-256: b8ad8b9823e912e259f2e9fbf02775ad15e09d7c136dd875fd7ef4043e553b85

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