Malicious PDF — malware analysis report

Static analysis result for SHA-256 860b7654dbea37a7…

MALICIOUS

PDF

64.7 KB Created: 2021-02-15 11:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c5690985b34242b0dc4bb820a53d1426 SHA-1: 4d876cf5926ad6d9e55760a213fd6b91756906cd SHA-256: 860b7654dbea37a710068c13dbdaf309c5d4e330749c1810f18163a8e373345a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, 'jacksth.ru', which is likely used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, suggests a lure related to 'esv audio bible dramatized', which is a common tactic for social engineering.

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://jacksth.ru/strik?utm_term=esv+audio+bible+dramatized PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371240/normal_600173e611454.pdfIn PDF document text
    • http://regvoolkim.website/gisawinojibemixobonelewyh3s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_6022d0a809fe2.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/hbhjgfz/levuvixidagilaremewe.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/hhCsjh4/rocket_royale_apk_2._1._1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488804/normal_6002eac269a6e.pdfIn PDF document text
    • http://cashbackk.site/light_me_up_lyrics_ingridesr4u.pdfIn PDF document text
    • http://cleaner360.shop/kavusiwubegavejupuwivimigs0t16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419628/normal_5fe3a23418d0e.pdfIn PDF document text
    • http://trynutra.shop/rufejidbchm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470687/normal_5ffb4f1b28bc9.pdfIn PDF document text
    • http://55571.ru/22329483375wca4h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484636/normal_6014e8159aecf.pdfIn PDF document text
    • http://sis-paypal.com/71925739981s6vx0.pdfIn PDF document text
    • http://wiinorama.website/fararen3c67.pdfIn PDF document text
    • https://cdn.sqhk.co/zetobazox/jijhyid/nujawoluzivigarireruboma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378160/normal_5fc944d15b71a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000be5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5E 5176 bytes
SHA-256: f9a1a202d8c4e4c57612d0ec6aadc3a8b68599ae1be74a8af19d37715fff5f85
font_01_sfnt_off0000cfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFED 10752 bytes
SHA-256: 9cee45d703efd62061d408ce0e4f8f751acd2b0b43eeb63b0ce77985d8efcdfb

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