Malicious PDF — malware analysis report

Static analysis result for SHA-256 debb598d8904884e…

MALICIOUS

PDF

64.4 KB Created: 2020-11-12 23:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 636d98e5e0c8bbb4568e3819bac7578c SHA-1: 6e3c2bad52b99ff61c68046f92838ba206eb99cb SHA-256: debb598d8904884e43ca2f03fd82b513b4961649cb8ab2058fcaaa9a00ad7a79
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=exponent+rules+worksheets+pdf In PDF document text
    • https://nagopajasire.weebly.com/uploads/1/3/4/3/134311949/rafovepa.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/piruxubowizogoxex.pdfIn PDF document text
    • https://bavexopifepixab.weebly.com/uploads/1/3/4/6/134683122/5591860.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/botisipizuz_supixikikijowa_kabexodonu.pdfIn PDF document text
    • https://bowogemiris.weebly.com/uploads/1/3/4/3/134316512/18acb6c05.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/nolarifaforuxop/48376304195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e3511a-9822-4e02-8c56-1a84d4870cdd/90956569250.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/37987509712.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/powder_river_symphony_orchestra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e4e2cb-bb26-4fd4-aa05-8f7d7b933d4b/33200937.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_off0000c006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC006 5100 bytes
SHA-256: 6d9ca1abfbbdcbc2b4c4995fad51c88791d6633495aedf387cd4306f85457d2e
font_01_sfnt_off0000d170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD170 10504 bytes
SHA-256: 0ede6592f48bb1cfaa769fa0b83c84a599ed17a341e15c3917a89bf8b58915e4