Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74b407a5b503e2e…

MALICIOUS

PDF

695.7 KB Created: 2021-02-08 09:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 08e85b6e2ef15523b9b23544a87bc846 SHA-1: e3c5f4f70b3ca7d7375a60a0d884a605f985a409 SHA-256: c74b407a5b503e2ef3d7efc80f31863845c8a164be26affc7c957923f8cdec2c
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, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, and the presence of embedded URLs suggests an attempt to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7325

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/aws?utm_term=prevention+of+food+adulteration+pdf PDF link annotation
    • https://gafojeted.weebly.com/uploads/1/3/1/4/131452963/c26a5d328dd1e3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_601a66b26818d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501374/normal_6004ebbf38d11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444096/normal_6015ffc9072dc.pdfIn PDF document text
    • https://mibivatoroxup.weebly.com/uploads/1/3/4/7/134762409/3062329.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5ff6695af069b.pdfIn PDF document text
    • http://fewomazojuxed.iblogger.org/wuvatefid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391319/normal_601297a3d0f17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5ff107b835e0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368975/normal_5ff9a902e6b47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_601a545b29e2b.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/juwiju_fegejusuwipes_komiziponupusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_6020931c4bb91.pdfIn PDF document text
    • https://soliduratop.weebly.com/uploads/1/3/2/3/132303261/juziwulifofejewilab.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/salosibejodod/dragon_age_2_money_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/55181240621.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/berserk_2017_soundtrack.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/49192070789.pdfIn PDF document text
    • http://punegejofuj.epizy.com/90055471423.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_off000a92b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA92B1 4916 bytes
SHA-256: ce85c81de8a84da337df094e46e895551fcdcc0a2ca3ca3020d4e8fdc24dd3e8
font_01_sfnt_off000aa38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA38D 12928 bytes
SHA-256: ed48cef6d0585c77c80ed61193c1c40dd1c0b24213844d295cbeb9f545caa153

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