Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99dbb7df54146ce…

MALICIOUS

PDF

75.6 KB Created: 2020-11-19 02:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c962748560da5fc017375c5c6ab4417e SHA-1: c734b0d492b4efb62e058af1ade3d96dc4bcb73c SHA-256: f99dbb7df54146cee90263e8b90480cb25da806ca4902ecda980a6afb77e45b1
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/wb?keyword=problem%20solving%20and%20decision%20making%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420592/normal_5fa359e74b86c.pdfIn PDF document text
    • https://diwapexag.weebly.com/uploads/1/3/4/4/134484560/rojofoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f87f6bae01fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fcd5c8ce-02bb-4d02-99c9-bd514ca4887d/lukorap.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/zixenebi.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/50213541021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c63612-6527-49a6-9c60-741af819577e/fallout_shelter_hacking_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/bonuratumusikez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e295f4-7e3e-44ea-ac2d-53796619a559/emil_coue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c08781b-2e67-40d3-9816-965650c7c6e3/53722172272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213af1a0-2a37-4862-8bf5-7dc2b8202624/o_livro_de_melquisedeque.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/honda_finance_credit_tiers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b15c0f8-1c19-4fa6-a2c1-5aab3801646d/65487571815.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 5448 bytes
SHA-256: 19e6da5bd33b4d531a39348a0b546a44fec83bada69be6be33996e71b021fcaf
font_01_sfnt_off0000f156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 10080 bytes
SHA-256: 9870c36b6a50973240fc73ec358a859cab7b9bf5a32fe003448d4badd2d692de
font_02_sfnt_off00011394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11394 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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