Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1bcc09815dbc05…

MALICIOUS

PDF

72.2 KB Created: 2021-02-19 15:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 5cd41e0e055a107dd8095430c4c54247 SHA-1: 2e6ec681a65a131de37fe8510242b3ffe1aded84 SHA-256: 1d1bcc09815dbc051d0adf700a8acc01bc5ea1b4eb30aff3b5a86c7e6de73d5d
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 URL pointing to 'leonvi.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to fitness.

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=how+to+get+toned+legs+with+weights PDF link annotation
    • https://cdn.sqhk.co/gobajejuz/wgeVWgd/merowefugavemexewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463529/normal_5fdab23879688.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/yxhijaM/redfin_estimate_vs_zestimate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404523/normal_5fcce5dc61026.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5fc9a6c597ec9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484995/normal_5fe2076f54cd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5ff455ee1c2b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_600b5c3e5ba65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445107/normal_5febf57746fd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474992/normal_5fda3b0ca421a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370076/normal_5fca97664f0f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495392/normal_5ff78c6103a3c.pdfIn PDF document text
    • https://cdn.sqhk.co/soxoxefumuv/jbjgegh/skydiving_houston_death.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469375/normal_5feb5c9409b8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409826/normal_5ffc811bd1df3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467278/normal_5fe9d22e08033.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/ropuba/jigotutemozo.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/boss_baby_movie_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/birthday_song_tamil_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/juviwa.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_off0000e08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08D 4836 bytes
SHA-256: 70592a5128f85d9e1485df5e53c922399d86215aa9bbc1b85b792073f9b4faaf
font_01_sfnt_off0000f112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF112 10300 bytes
SHA-256: 64c6c4149f024fc1c1cb2e5abd598158177562734f22e98b0bad9cc74de4feb3

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