Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d68ab1298f9a3e8…

MALICIOUS

PDF

65.3 KB Created: 2021-02-25 20:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3cfd0f10828ecb2a41a6a943d0e3d0de SHA-1: 14f92a38e2b8376b560b7d3c1dca3572d8620e43 SHA-256: 2d68ab1298f9a3e80921a595e93d6fee2566c59b90a9856618500654520fc244
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://leonvi.ru/award?keyword=microelectronic+circuits+7th+edition+solutions+pdf PDF link annotation
    • https://cdn.sqhk.co/vemegunir/UDhgghc/82686839924.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454670/normal_5fc7ba0b0db0e.pdfIn PDF document text
    • http://7gusevshop.website/pocso_ka_full_form6n4cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_5fd2834d15fc5.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/cchjthi/skater_boy_from_clueless.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/ha7ha0U/56568272825.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/cPNKgeI/hocus_pocus_2_release_date_uk.pdfIn PDF document text
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/nelowizadevofizezigu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_6007afc155abd.pdfIn PDF document text
    • https://cdn.sqhk.co/pulijidapis/jh9ibhh/munabirinobetegesaxodoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498992/normal_60240102ab1f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456116/normal_5ffe99c950337.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/jjgcjic/lutokejul.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/1zy6fpb/homer_simpson_soundboard.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A1 5116 bytes
SHA-256: 3625408c05ba4ab1e82f23c8bf465003eb64eb711e9c9b14afb069c4bdf9dc51
font_01_sfnt_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 9920 bytes
SHA-256: 7001f3a707ec172bc4c0531813f4c64a073da0b89a205fcf403e82530dfa08ea