Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebd3c2be7728693…

MALICIOUS

PDF

85.5 KB Created: 2021-03-29 20:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6b33b050995b395710944dc826b4de94 SHA-1: aabdf3b676c3e85a2c4efa712d1e9c7f90174fba SHA-256: bebd3c2be77286938c710ce5d36d5440561158f7fac98b22cfdfc567344228c2
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://golowaki.ru/wix?keyword=designing+a+planetary+gearbox', which is likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=designing+a+planetary+gearbox PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422137/normal_5ff1911aded12.pdfIn PDF document text
    • http://sazodiv.iblogger.org/how_to_increase_height_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_603c5045202c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_600ce5b9a7010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5fe5536035336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_600e7d2e7451e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_6061b56f74138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465262/normal_602f7036e91cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465006/normal_5ff803585d706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448323/normal_600a544f05663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_6054f6a844d32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406466/normal_5fcd3ed521ec1.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/ronenitevodo/building_management_system.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/83707958255.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/irobot_roomba_960_robot_vacuum-_wi-fi_connected.pdfIn PDF document text
    • http://puteroxono.epizy.com/sketchup_pro_2019_crack_free_download_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/bc_corporations_act.pdfIn PDF document text
    • http://niresadumave.rf.gd/wolomoja.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/causes_of_world_war_ii_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/pamewufisudilavotip.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/kemukirifalipujelaj.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/star_wars_complete_vehicles.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/40021589577.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/zebotifen.pdfIn PDF document text
    • http://pixutuvaw.rf.gd/9273726165.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_off00010f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F40 5296 bytes
SHA-256: 0442d57f9aacaa3f0b02d77bb8c43c1e2094a09f1b44383786c36fa9fd9ac64e
font_01_sfnt_off00012161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12161 11548 bytes
SHA-256: c5d4d123071bbfa4de4ea5008556d70c4128556c8b5d3caca9b580f5cf9c4258

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