Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69866aed41fd36c…

MALICIOUS

PDF

70.1 KB Created: 2020-11-11 15:34:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 59f11790789ee0070fcf36ea92eaaef6 SHA-1: af9ae7c30a09f4efb1508961dc1b5570bef55d8b SHA-256: f69866aed41fd36cba77e38982d4eed4f8419b399886545244790b701acad1c9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=darkest+dungeon+the+weald+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87213409af9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_5f9652418b4be.pdfIn PDF document text
    • https://kolerekum.weebly.com/uploads/1/3/4/3/134350376/mijomefufog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_5f9727541766e.pdfIn PDF document text
    • https://pizojiri.weebly.com/uploads/1/3/4/6/134651663/46e9329d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5f92070bb1d62.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/vitelitubovuluj/pubalutifitirolopudota.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/arduino_serial_library.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af709a39-0a28-472e-91cb-c0252556bbdd/italy_travel_guide_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b0ce8f-e29e-4b45-8d49-090fa9009e7b/debopixafaramaref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47cb090b-54e3-4b4a-9d86-d80aa909aac5/57247988787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d464b70-be24-4254-9737-ad7d2bd306ac/rujupufowebejela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d972b3c9-3c06-4d7e-9cc5-4b8188ecaca5/23211002047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67e6590-471c-4c81-aa2e-2fbd38c647c7/sewasulajijuriterikij.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/44939224906.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_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 5240 bytes
SHA-256: a730ee91db003dc1ffdb3c9ab475d3f55f966ccff5118f09b4f604d64638a914
font_01_sfnt_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 10008 bytes
SHA-256: 22457a5f900c9db96a7e29bb188bfb3d2293b626f53e633627d69bd0b1b0e7e7

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