Malicious PDF — malware analysis report

Static analysis result for SHA-256 477aa29b7de6a06b…

MALICIOUS

PDF

88.1 KB Created: 2021-03-24 13:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f855a151906662a775408e4ebddb13ef SHA-1: 4351e1a1930988ffa5933016f6e2dcfc456f70ef SHA-256: 477aa29b7de6a06bcfa8ede63a4adaa1bce883fb1d75ae89012463d7873b6296
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'zajinet.ru', which is likely a phishing lure. Although the document body is heavily obfuscated, the presence of the external URI and the ML/ClamAV detections strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=define+teaching+approaches+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421209/normal_5fcb6fac1cd42.pdfIn PDF document text
    • http://gikiwasixe.66ghz.com/55546742767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_60461f5fbc686.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/unicorn_cx2100_electronic_dartboard_instruction_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493873/normal_5fdd218fc0ad4.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/public_finance_act.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/alimentos_con_carbohidratos_complejos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://09d7e2b9-79a3-4876-9e00-73a1ba4263a4.filesusr.com/ugd/92fcd7_fd1af807b6504dd782edf5e0bc3339eb.pdf?index=trueIn PDF document text
    • http://liresuxukezu.rf.gd/five_nights_at_freddys_3_jogo_online_gratis.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_deec5ba05e8547939b033d90250c13bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/fufonalizapekuri.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/minecraft_mobestiary_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/86042385042.pdfIn PDF document text
    • https://acf4d67e-a68f-4587-a5cf-e157bda03b6e.filesusr.com/ugd/173616_6773f072535349cc9ab1fb1bb6a44405.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/contract_agreement_format_between_two_companies.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/6380409731.pdfIn PDF document text
    • http://jelugubafegoj.rf.gd/36527430948.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/12894096904.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/40611445472.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_off00011b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B03 5384 bytes
SHA-256: 3b591959cb51be52fee68e989e26303ed68eef51d8f59b7c8219555692f01027
font_01_sfnt_off00012d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D58 11708 bytes
SHA-256: 27e61830d2ce7f85368688ff5d02c91e1a0ddb7d15596e2f5d740af386d31492

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