Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bed2f39adeddb5d…

MALICIOUS

PDF

71.5 KB Created: 2021-02-24 14:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2474dc503ebf3b51d84652f888c28100 SHA-1: f345697d7a57634c94da9ecc1ef0d08b48655074 SHA-256: 7bed2f39adeddb5da7e9b692a3db0b7289e1b116aa18d367f5bef2b6e5c955f4
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://leonvi.ru/award?keyword=what+film+does+a+polaroid+onestep+use PDF link annotation
    • https://cdn.sqhk.co/tazifawixax/C9Ohigd/72191408783.pdfIn PDF document text
    • https://cdn.sqhk.co/xafukapewe/pjfihjd/96037235385.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/TcLH2ic/47757862983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475847/normal_5feb012a36082.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375340/normal_600854e28b062.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452853/normal_5ff559067f360.pdfIn PDF document text
    • https://mabunamu.weebly.com/uploads/1/3/4/9/134902385/e29df6b9.pdfIn PDF document text
    • https://cdn.sqhk.co/liregagibago/ihggRjb/dipibasilivomok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476567/normal_602222187997b.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/tiluwisulepam/lonely_boy_images_with_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/whatsapp_free_pc_software.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/free_printable_doubling_and_halving_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/cute_cartoon_wallpaper.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_off0000dc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC12 5292 bytes
SHA-256: ea256e09408054fbe9d3ae8efcf64c96a032324ed4ae54d5d436ea68550a8e6b
font_01_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 10256 bytes
SHA-256: 6b61925e808a822c2dbea271f1e4d7e01c99697f46accf3433a1d03f734d53e6