Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebea3f74464866c…

MALICIOUS

PDF

72.3 KB Created: 2021-03-03 08:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4936aa7968a29866894f2d766fb79c92 SHA-1: 1f9318df3c45efd3a9c4a4e43f1f03fca0ed3117 SHA-256: 5ebea3f74464866c40192d675f8335cdd08bf920d9772202e028ea8251ad2b4a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=2015+ford+ranger+2.2+towing+capacity'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates a malicious intent to lure the user to a harmful site. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=2015+ford+ranger+2.2+towing+capacity In PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/hLIP4gj/epic_seven_stove_error_39999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417805/normal_600d96f5c2541.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/hiSjbie/90953692390.pdfIn PDF document text
    • http://kulinar2020.site/bovagao1hmz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470400/normal_6003b30c55c6a.pdfIn PDF document text
    • http://kigurumi.org/29647683646u8tis.pdfIn PDF document text
    • https://cdn.sqhk.co/vabedesi/BMehgLQ/96152012114.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/jeFE7ic/zodugexas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447878/normal_600690b9c7a79.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/voxazedisula/68820465598.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/62423729539.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/76020952258.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/32480535635.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/vorafet.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/19182670040.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_off0000dc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5F 5692 bytes
SHA-256: ff25925493f84a301d13ab868bf2f64c4dfd5f5250665d8c2b8c40b4eeb8d6c9
font_01_sfnt_off0000f005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF005 10524 bytes
SHA-256: e97c147ae99e1c7b3fc63b62e33e37bbc9319236b81edec13e9290943185fa0c

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