Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5cbe1196a8297b3…

MALICIOUS

PDF

40.6 KB Created: 2020-10-31 15:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 96c922e566ffb6945e31315d8dc89032 SHA-1: db084378b494736e6fcd0fecac1c58d832641356 SHA-256: b5cbe1196a8297b3ceaa37132995b92eeba8b5a63c8c7c2fbb3a7abb33af2465
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=star+wars+minifigures+list In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f88881c56225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_5f92302a73a34.pdfIn PDF document text
    • https://denibizokitig.weebly.com/uploads/1/3/4/3/134340328/labinabez_lekituxu_kimul.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://s3.amazonaws.com/megodipewukitoj/my_life_is_in_you_lord_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f599cee1-d6b9-432b-aa1e-36e98c29a902/xojojetovevi.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/mubizojaniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca13f25b-2190-4dbe-8a4c-833fd2e3b451/defavojoginiviwowir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea54049-7269-4dbb-b44a-211710b414b8/jovufedaruvawudasogeruw.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/xibasekoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3047383d-72cb-4e3e-973b-156427fdd0be/nujotij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ebdc6c0-25f9-4f2f-aa23-f8a6b1d9fa4a/31517143158.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_off000050fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50FE 5056 bytes
SHA-256: 9379ff000fa73a8d3ec41c9c999c821c979d40360155924370f8b34e2bb448ef
font_01_sfnt_off00006218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 11148 bytes
SHA-256: 7180443b0090d6830bcab19c38e78d4cf5e86718b16e11efadf74eb07ed7ff47
font_02_sfnt_off00008796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8796 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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