Malicious PDF — malware analysis report

Static analysis result for SHA-256 863bbfebc0d93cf7…

MALICIOUS

PDF

71.6 KB Created: 2021-02-22 17:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4d4f470f13e54b66b23eda2df2d2e2e1 SHA-1: 075636a1f6541606c617cb388e49911aca3a9037 SHA-256: 863bbfebc0d93cf7e7d4944d999d33693d9ce15f4f74b65aabaf9d1c387edbda
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wix?keyword=pathfinder+svirfneblin+names PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473638/normal_5fe394833ef01.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/jiyhitT/mebixefatitogaramoxoper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5fec895259913.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/hcgiFj0/td42_auto_flexplate.pdfIn PDF document text
    • https://cdn.sqhk.co/wuladupuzo/XD4WNgc/89892746965.pdfIn PDF document text
    • https://fumamefix.weebly.com/uploads/1/3/0/8/130873833/rikukuxegutenajitudi.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/Ggfigme/christmas_delivery_slots_2020_tesco.pdfIn PDF document text
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/pufopogone.pdfIn PDF document text
    • https://zanobevaduj.weebly.com/uploads/1/3/2/6/132682049/adb939a165d8c.pdfIn PDF document text
    • https://kuvinonufero.weebly.com/uploads/1/3/4/3/134307364/4050788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5fdbd9ea3bb8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448980/normal_602c3e13d48f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427799/normal_5fdca710e9d21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1B 5348 bytes
SHA-256: cf0b18a10df35370ff38ce8bdfe0eb194183b57fb6e1de779241862d7944bcfa
font_01_sfnt_off0000ed27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED27 10628 bytes
SHA-256: 55de64554464d3c8aa1eb29ade5685980381a3cfda03b3c5bd571e5cd8c39498