Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6bd7d1ac6d3e40…

MALICIOUS

PDF

79.8 KB Created: 2021-04-03 05:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 33405467c2c113c231aff5f2e46b3beb SHA-1: 73ee08f775e58a4d064a4cade2d48d990f11cacf SHA-256: bf6bd7d1ac6d3e4028a9c5621cc460220ff3a3b26f522f3e4c2a824877b66738
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains references to 'convert pdf to word automator' and the authoring application 'wkhtmltopdf', suggesting a lure. An external URI pointing to 'lozipotod.ru' was extracted, which likely hosts the malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/award?keyword=convert+pdf+to+word+automator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409113/normal_5feb6db68a080.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fce51bcc77b5.pdfIn PDF document text
    • http://vvinorama.website/pukaganuvabeturujoxd81dw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483602/normal_5fe15f6d19c85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_602089ad98db5.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/iggiiHl/1245728161.pdfIn PDF document text
    • http://cosmicgig.com/37158724072i44d8.pdfIn PDF document text
    • http://mirror-x.org/drink_facts_did_you_knowralcl.pdfIn PDF document text
    • http://samyog.ru/divegusefulewigitozuloviduq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_5fd9c4d549845.pdfIn PDF document text
    • https://cdn.sqhk.co/bezedono/lC1ahiW/kanedukiduza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463565/normal_602cf239381c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471945/normal_5ff8915c311d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_60210389c6dd7.pdfIn PDF document text
    • http://lenilafifita.22web.org/princess_diaries_2_cast_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/d75XUjc/61583621784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5fda550839872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_604308859d459.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386334/normal_5fdfdabaaec6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://koxaxinum.epizy.com/17881777782.pdfIn PDF document text
    • http://nejatunopux.epizy.com/yamaha_rx-v385_price.pdfIn PDF document text
    • http://babokad.epizy.com/zuvipezepi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 4988 bytes
SHA-256: a40ecc3337675fa9c1fea5cc11f4c2ae6369c99915f06992e543fedd0171db5f
font_01_sfnt_off0000fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 10928 bytes
SHA-256: 3dbe3ddb34a9b980147b16308ae602fca7d0b324a0ec9b1e759ee7132a745841
font_02_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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