Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a26e2691f5c0c3…

MALICIOUS

PDF

74.1 KB Created: 2021-02-22 23:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a61d5465c820b74df6410d7f5bab78cf SHA-1: 7567a07314c2057db1c70720e4c6684f15e25654 SHA-256: b0a26e2691f5c0c32efffbfc054260c7951000ed35e69c1ef1b32def0bbabc3e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or credential harvesting campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=formula+for+the+sum+of+the+measures+of+the+interior+angles+of+a+regular+polygon PDF link annotation
    • https://fitezaxuju.weebly.com/uploads/1/3/4/7/134724711/vifiletal.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/6cMiigL/diba_shoes_outlet_store_earth_city_mo.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/gdDCRrI/brimonidine_gel_otc.pdfIn PDF document text
    • https://dajitogaxafolix.weebly.com/uploads/1/3/1/1/131164176/xadade_rizufew.pdfIn PDF document text
    • https://rapusixub.weebly.com/uploads/1/3/4/6/134631860/f4d6475fad4928.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/4008566.pdfIn PDF document text
    • https://foraketarikovef.weebly.com/uploads/1/3/4/6/134608655/2428530.pdfIn PDF document text
    • https://migawireradafus.weebly.com/uploads/1/3/2/6/132695569/2204566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488323/normal_5fcb5ab841595.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/3jbhfOB/wololo_meaning_aoe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458132/normal_6008d8d7a5d88.pdfIn PDF document text
    • https://jokenobijejadur.weebly.com/uploads/1/3/0/8/130873794/tonijok.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/vonutavekip/69810593292.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/26848191603.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/juginefur.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/dadazuvojujosiwofamizosov.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/dutabizile.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/57620987555.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/diccionario_griego_espaol_biblico.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE54 5372 bytes
SHA-256: b4d5f2b8e1083d12e7f47afac6c3bdb0bd2d038c6d5191bd652143fb706a0013
font_01_sfnt_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 10576 bytes
SHA-256: 082bf31cc8ee39796c2a1aeb8990e769723673eef595017805bd48808ef39cf8
font_02_sfnt_off000104e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E3 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca

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