Malicious PDF — malware analysis report

Static analysis result for SHA-256 334931c16a964e2e…

MALICIOUS

PDF

76.6 KB Created: 2021-02-24 14:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 69f48eca895760e57e1abb3cda94a202 SHA-1: 5eefbd608497ff3ec87c7ae90f47f4758b50fd51 SHA-256: 334931c16a964e2ea534d2038b17b0b3832de321161f3adb2057bda45d755c2e
96 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with the ClamAV detection name indicating it is a phishing trojan. An external URI pointing to 'leonvi.ru' was extracted, suggesting a phishing lure. Although no scripts were explicitly extracted, the PDF format and the presence of embedded URLs are common for phishing attacks.

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://leonvi.ru/strik?utm_term=what+is+geometric+modeling PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5fccffffda7da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_5fd278d591c41.pdfIn PDF document text
    • http://tiktokfrance.fun/felexakawojkkaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459028/normal_6004b2a10dc1e.pdfIn PDF document text
    • http://sweetygirl.club/dibisosami43amk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488581/normal_60023fd7862dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421335/normal_5fcf135f407d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500887/normal_6029b62b85130.pdfIn PDF document text
    • http://bridgecommerce.com/nafatudobogikovswg8.pdfIn PDF document text
    • http://hesap-al-sat.com/reactions_of_metal_carbonates_with_acids_worksheet_answers7tx2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_6025d0e485d12.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/fuwawibu/sodium_hypochlorite_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/gixivorenofid.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/casper_test_good_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/gamibemefivo.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/85980414917.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/cantata_de_natal_gospel.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_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 5364 bytes
SHA-256: 47293bb6e8bf9ce7ec85c40723ad82ae16328d7c5d0e1a72fd60a9079bbcb533
font_01_sfnt_off0000fea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 11324 bytes
SHA-256: de15e8fcffb086c7b1b6f1385c1b3666075dd5b0c4bbd9b48b11b734597fcde2

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