Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f702b2a608e0cc5…

MALICIOUS

PDF

73.0 KB Created: 2021-02-25 04:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d2164908b6463f7ad7cd9d7dfd41ef3f SHA-1: 701b2e726838b51c6c5ac028b6d4395468185461 SHA-256: 3f702b2a608e0cc584b85249f4dbe22fbe09647611493d667fb9ee92eb903a94
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=cocina+criolla+carmen+valldejuli+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5fe91cc8c10ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473645/normal_5fc582cc57fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415767/normal_5fe9c83237861.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389804/normal_5fc70d4f4849e.pdfIn PDF document text
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/5005941.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/agegfih/juzenokadazidad.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/ihI1ibN/word_sweety_app_cash_out.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/jigchzk/49919196369.pdfIn PDF document text
    • http://mon-cmso.best/893174452146ot0e.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/zebarufuridorur/idsa_cap_guidelines_2019.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/75245328226.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/tamisolokitidigu.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_off0000de5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5B 5164 bytes
SHA-256: ef98ca41cc0fa1e3c946c6be1d32ff7d62e6ddf79ddf0b22b3b6811b2a4ecc60
font_01_sfnt_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 11592 bytes
SHA-256: f87c637fcb7fe4db68a102e98ace0cef9accb33375c9f5698e5004c5d6f1cd65

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