Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcf1510e1420892…

MALICIOUS

PDF

42.8 KB Created: 2020-11-07 05:05:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 30a57783e32b7cdde9212bcf5a98b2bb SHA-1: 5aca2d81373cebf16f2951c66775a5dafdd26a59 SHA-256: bfcf1510e1420892ff7326ba123b86eea6605b180dc313a7f20a5db3592d320e
116 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://trafffi.ru/123?keyword=steam+free+game+codes+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416934/normal_5f9b220b3c48e.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/fumiposamisur/nowuronutod.pdfIn PDF document text
    • https://fubesore.files.wordpress.com/2020/11/pixixarobutafufofivibulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f93258-b2b2-4cb9-8a80-e28911a7a9ff/vofuwoxumamofujeji.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/vexato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f230a8d1-e22d-4dc6-9d27-586f305c0bb7/rusch_baby_food_processor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e07cb39-fe6a-4769-a19b-b6d1f3ee811f/46820097244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/435fb6f5-5dc4-4d1d-aea1-728e9fbedf15/mikinudovetibisupowudo.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/lopurotunipevud.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/assembler_plusieurs_en_1_avec_adobe_reader.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_off00006610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 5896 bytes
SHA-256: a397d60f9d16170eb043afa0ee2cff39ed70ba482026a75df4c44338993cc60e
font_01_sfnt_off00007a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0B 10724 bytes
SHA-256: c8843445b7a30e0e35b11cae3589ac9acfa08403c1746c0de0a3a38c37b329da