Malicious PDF — malware analysis report

Static analysis result for SHA-256 98929d40dbc2dfbc…

MALICIOUS

PDF

77.9 KB Created: 2021-02-21 02:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 1dd9684affe746fae98b53c946308a6a SHA-1: 9e3f2febc66e6481e22a7d5c4e704136c9c39311 SHA-256: 98929d40dbc2dfbc4ad67fcf6084fed09f3e0f1cdedaec952ca980f32320cb8b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+clear+acne+marks+at+home In PDF document text
    • https://cdn.sqhk.co/lorotukogof/jdUhffJ/59004616279.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478141/normal_5ffca851e43d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_5fd1669a66250.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/jeMhgKe/age_of_discovery_game_app.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/vxgcjbv/happy_fall_yall_sign_printable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423471/normal_600ee79d4ee32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_602c720705884.pdfIn PDF document text
    • https://cdn.sqhk.co/duloputemab/igQjcie/kurikebezenaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_600e5f10f31d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375891/normal_5feb6040e2f4f.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/nhc7gi1/dragon_lord_locations_skyrim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5feee3f3d6b07.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/dunaGgh/off_road_forester_xt.pdfIn PDF document text
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/taporavevijaja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davafegi.epizy.com/lotimo.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_off0000f5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E1 5156 bytes
SHA-256: 6cf6d6edaa1614c6677ae303ee6f8084aaecaadcaacea3d5749415fd04743451
font_01_sfnt_off0001074b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074B 10420 bytes
SHA-256: e55c786ebddffad41b91845b9a2c000f1369dee55ae8ca676d3862becd06d878