Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e26c945ac98f879…

MALICIOUS

PDF

43.5 KB Created: 2020-11-09 16:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 34ef4824d0c99e5a54745755556b5707 SHA-1: dfd1754cba5ddeb473fcdb27a0387ee43ba1a6f8 SHA-256: 7e26c945ac98f879f3a012781126092c63a3f2feba9d2736ea2aafeba844b9ce
84 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/aws?keyword=google+docs+save+as+a+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382004/normal_5f8b6f24dfa8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_5f990aaa2c135.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/newopetusam/fasuvupaxasexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0aa95a6-9082-4fb9-bc17-a52790195a59/gejefudomelubuvepubirimu.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/48074182322.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/2017_camaro_convertible_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/1284968498.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/celerio_tour_h2_brochure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461a5fd1-4a93-4319-80eb-4a875b1334bf/gukavezeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21018fb4-6d11-4c72-b072-89ae0735a325/mk18_vs_m4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efedd671-1de9-413c-8686-d949a43f0172/mulamodizivuxiwep.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/kirivupipo.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_off000067ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67ED 5316 bytes
SHA-256: 933f807b88004097c4eb15f3b3c0b8af447c40c29a24f7b4830c840381bcf0e7
font_01_sfnt_off00007a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2A 11788 bytes
SHA-256: aef180b699cd2a2b6ddad6217653559d84b293452814117f9e1ee14f475be704