Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6761a32991c37c…

MALICIOUS

PDF

67.9 KB Created: 2021-03-05 19:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ab6eaa4ade70b1488a2060a1d5059c0b SHA-1: 77ffda03db01222ac473cd0eb055be159ba939f6 SHA-256: 8c6761a32991c37c4292c7a6c1efb48be7c4e93cec8772767fa9d04faa587489
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/wix?keyword=manual+gaggia+syncrony+logic PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5ff802ef2404a.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/ijjuihJ/game_box_for_tools.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372753/normal_5fe179633f620.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/wgc5Eie/how_to_turn_data_roaming_off_iphone_xs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_d5f8e3d8a5de4356a329677f4b08a730.pdf?index=trueIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_4de0601f77424b9bb3ceebbaea3891b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25461623-65f2-462e-8850-2c23be406724/54237913494.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/angry_prash_christmas_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b92dcec7-7d4e-424a-a989-eb8b8006148d/voxajurijekeparawuratob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5b787c-017f-48f0-924d-3174dee568a9/91119407444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832ab322-5086-4490-a3e3-8307c0c75d74/oster_belgian_waffle_maker_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1404cc71-f336-4e36-a987-ffc10828bcac/wewurizumijejek.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/fact_family_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/94388954852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a424cd72-c713-454a-905e-90872911ae40/how_to_define_human_trafficking.pdfIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_096b8aed8c1c417aaacbc840c4e4c07a.pdf?index=trueIn 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_off0000cf4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4D 5072 bytes
SHA-256: 06d20d253236791510a92724d17914958f0103f7e3c59138c4d0503b84762e5c
font_01_sfnt_off0000e0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 9952 bytes
SHA-256: 6a7a22d6194bfc7e97e65103c3b2e2ebf45b689acd61a2ccb26c68dbca5983aa

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