Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4dd610831e0909…

MALICIOUS

PDF

41.8 KB Created: 2020-11-09 14:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c4895ef9ef408efcc619b97036be7ebb SHA-1: 281f1761a5782f2c9ca7080cfa3ea6f15964754a SHA-256: 9c4dd610831e0909af1d1aa3cb3ef7619a8081bbbc9b763f5f809a9517c34e82
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffi.ru/123?keyword=oia+track+results PDF link annotation
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/fizedivovidag-lijowu.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/nebomimut.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/muganazaju_datezasasexipap.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/ganubatebedoxez/40492359425.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/88268962760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4e68f8-aa7b-4411-86d0-b4aa8014b181/golegituzeluvumexefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/614600c1-46ee-478e-9449-507902eca864/keller_s_bakery_lafayette_la.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/33401703447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e77ff60-68b5-427f-997e-26eb826e9879/mamitenimaloxi.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/37727554915.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/strength_training_program_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9acdba2-ccea-4dd1-9e86-f073d6d3f20c/25035533238.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_off0000624b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624B 4884 bytes
SHA-256: 46b4abdfa74bb3d27a310fd692569a2cea2f47e25589bb406715a9852f6c0e10
font_01_sfnt_off000072f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F6 12280 bytes
SHA-256: 9e19037463a4ff1971327a42b899412cfcd3b3614193e84004e6dc4d57e05f0b