Malicious PDF — malware analysis report

Static analysis result for SHA-256 24011ce6d7c02932…

MALICIOUS

PDF

70.1 KB Created: 2020-11-27 16:28:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d308bd9c2037ebf68a5fb8a79883f13e SHA-1: 41f2b484a59597c5c7acfe0e6d59b4672f8307b7 SHA-256: 24011ce6d7c02932f7fd8edaa58716bab426a07af734608977d210847330df29
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://trafficel.ru/123?utm_term=gluten+free+grocery+shopping+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413375/normal_5f9e9b17c2ab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5f88d0b9069ed.pdfIn PDF document text
    • https://medekokimezud.weebly.com/uploads/1/3/4/7/134748457/raroji-mefusawowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_5fba6e098a475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f8f4f3d7c847.pdfIn PDF document text
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/sopudavaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402740/normal_5fa3a6bfb0cf3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/729be4ea-c184-4013-a5a2-34ed5da14da0/84873334595.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/resowul.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/multicellular_organisms_levels_of_organization_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/14113950544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cc6dcb-bdf3-4d59-ac22-f72e59f34ffb/jemin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f15d65f-69bf-4b17-9ce7-15c8711283cb/dell_precision_m4500_service_manual.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_off0000d57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57C 5340 bytes
SHA-256: db006875c555e45c5180a79a79206f10989d9c8f9f9750d4bf31fbbdfa2260b0
font_01_sfnt_off0000e7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B4 10548 bytes
SHA-256: 92cde79ae31edc9e16b82e6e3583d368ab3bc43b75ff2407eae829cc55cf01bf

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