Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1451fd9e30f90d…

MALICIOUS

PDF

41.5 KB Created: 2020-09-30 17:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c043f5578d7fe66233492eafd89b989a SHA-1: 6659f9d461bb5d10cf48311eb89222835037c236 SHA-256: 0a1451fd9e30f90da527ce8fbd705a666b89ce4a906d0f7390799dd50f3ca18b
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=bicarbonato+de+sodio+para+los+dientes+pdf In PDF document text
    • http://ponimufam.ronaldwallach.com/uploads/1/3/2/6/132683438/9746102.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/23226043640.pdfIn PDF document text
    • https://site-1038601.mozfiles.com/files/1038601/rapedafuvosa.pdfIn PDF document text
    • https://site-1038710.mozfiles.com/files/1038710/67110708416.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35ac88f-d634-4016-93ad-956fd89aa2dd/diwepefoparojejazemedupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e6fce2-c030-47f0-9ee7-65f924ee464d/19865733512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27490d53-1a03-4d52-adc5-111e51c564e8/34167378704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f7ce6ea-545f-4e9d-a7d3-ddd07baf838e/zetorakuwiwimika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14472313-5cbe-4c96-ad91-18e968c565e1/wigogozafip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e5363e-3d6b-4026-99a7-7bcf25352dfd/toloba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b965ca-939e-42bf-aef0-a7671669a260/koxawimetolagajuxaji.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_off000061a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A5 5336 bytes
SHA-256: 24f814126dbe6ab8875cf0ed8166b5005b70f92e813595fd044ec8bed1fd5c54
font_01_sfnt_off000073d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D5 10916 bytes
SHA-256: 700355fa3d1d1ce5abd37ba2f4201af72283e73c9b9cc69036ab6bb8ef1bce7e