Malicious PDF — malware analysis report

Static analysis result for SHA-256 33727040aa8543a0…

MALICIOUS

PDF

60.2 KB Created: 2020-11-11 02:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: d04ec4baf716936603b63fedc05eb80e SHA-1: 31ff995d5b1aee6d104c67553959c2bc88cbeee8 SHA-256: 33727040aa8543a0ee29de66c80d8fe6cfeb4d28bcf7fada4d467ed55248beda
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/123?keyword=marathon+manual+roll+towel+dispenser PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413967/normal_5f94519cb6a9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f9bb47d45e1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f9dbedaa903d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390684/normal_5f8f309518bb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455374/normal_5fa59a1192410.pdfIn PDF document text
    • https://gepolurur.weebly.com/uploads/1/3/4/6/134610134/aa170bd4488.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/591dad5b.pdfIn PDF document text
    • https://morizuni.weebly.com/uploads/1/3/4/6/134606759/sizozi.pdfIn PDF document text
    • https://wilowepixamu.weebly.com/uploads/1/3/4/4/134476622/rijepefeg-fijogamakobir-pofopobaju.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/gawabog/collinear_points_in_a_plane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af22e2db-8120-4ee8-a62e-6b7524b4c067/60130655408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d99497af-40e7-40de-908a-1841a6112f5a/gekakodunepowibunufi.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_off0000ae1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1A 5296 bytes
SHA-256: 3134d1b1777f93f286a4009d881a7697070090a139bdd0bcc00e4dde34234ccb
font_01_sfnt_off0000c00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00D 10108 bytes
SHA-256: 5ac234e42f87356f9baac5191d5e2d8e3cb64090331fffa62993761dfb303f3c