Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6aa4266c8a220b…

MALICIOUS

PDF

69.7 KB Created: 2021-01-27 04:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1c1720eb61753cc267d604ba2164ddc3 SHA-1: b2db5f14d7a80bcdab397fe6137cfd35390a425c SHA-256: 8f6aa4266c8a220b233bea404e1ff8a0dedb20d1593b332e5843e358d9d7c1ea
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/wb?keyword=tabletop%20simulator%20warhammer%2040k%209th%20edition In PDF document text
    • https://cdn.sqhk.co/navimoxa/iaOGWA7/42824649446.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimofaw/hcgpkgi/shortcut_run_game_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501029/normal_5fd678fe3c0e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405903/normal_5fee8160d919e.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/cgelig5/95329910753.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/2016346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5fcf32135b069.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/8YVhaAl/elements_and_principles_of_art_matrix.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/ihgJicV/86772246000.pdfIn PDF document text
    • http://lnstagramsupportlives.com/exit_run_rate_definitionbc9od.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/hbbQChd/javejonude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476577/normal_600a460261479.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/hYwBgck/tufonewobip.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/lotibabakuj/88549962291.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/nivel_de_estudio_descriptivo.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_off0000d130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD130 5832 bytes
SHA-256: 41670b2b0ea6373d9c83097082a300ce20b5dfed55be925076daf0f3a32fbbec
font_01_sfnt_off0000e4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 10756 bytes
SHA-256: 24a7e45e344dfbe5007e3328a64a783f463e184b8fed0f7112218842fbca090c