Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 af34c732c0245c6b…

MALICIOUS

PDF / .VIR

70.7 KB Created: 2021-05-19 23:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2024-07-13
MD5: 2992e7b313a079582d2b53bee2168d9a SHA-1: a5b563a6fcac3bbf5e418594e9493563196a1871 SHA-256: af34c732c0245c6b95c4d0ef5639419ab5d5500c2bdf5e7de81529bc306e709b
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • PDF carries website-builder CDN document link farm medium PDF_CDN_PDF_LINK_FARM
    PDF contains many clickable PDF links parked on website-builder CDNs or simple download gateways together with visible ebook, manual, or download lure text. This matches generated SEO document carriers used to route users through untrusted link/download chains; the PDF itself is an inert link carrier.
  • 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://druttle.ru/strik?utm_term=top+shottas+full+movie+youtube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404293/normal_601d7cd151d55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407060/normal_6041e3c445021.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419633/normal_6006df1e61f6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_604ccb934655e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383794/normal_5fed23e7ef623.pdfIn PDF document text
    • https://bupuvebawa.weebly.com/uploads/1/3/2/7/132740405/muvoxudo-murijajerupe-kozogerewe-manomugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_604a25c5b82eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_601dd124474e8.pdfIn PDF document text
    • https://gedenotovet.weebly.com/uploads/1/3/1/3/131379555/wajipagajoveki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494433/normal_603831fab5e68.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/55834546301.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/54450843499.pdfIn PDF document text
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/c2c61bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_602f42c7d1c2d.pdfIn PDF document text
    • https://lixobezabutefa.weebly.com/uploads/1/3/1/4/131406736/kenivixemufelumizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_606e242700b91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481665/normal_605c8f3289cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_600ea98bc4a89.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/what_is_the_best_hvlp_gravity_feed_spray_gun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409799/normal_602b50b48dcaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468819/normal_6040e45ec6371.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000d669.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000d669.bin)
    • 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 extracted file (font_00_sfnt_off0000d669.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD669 5296 bytes
SHA-256: e046797ddaad09760b17f4a5a7265cfe1df1b1af8948ddb721cd9e6c54ce9b92
font_01_sfnt_off0000e858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE858 11016 bytes
SHA-256: 3363e35d72b112e891d7225c88df122cd6209ca9dce5034cb03c962bb6ba8b7e