Malicious PDF — malware analysis report

Static analysis result for SHA-256 8641bb815c004d7b…

MALICIOUS

PDF

72.7 KB Created: 2021-02-21 14:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8ae9a6f84973a061aacaa33ac17a6975 SHA-1: 6f93189aa50e83a8008bf94582d691d7b6e342db SHA-256: 8641bb815c004d7bf16ad9c752236497c6dc2519a7eba8f0571caf9a4532e647
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://baarspo.ru/wix?keyword=ipod+a1320+manual PDF link annotation
    • https://cdn.sqhk.co/dasotipamu/Zgfjbhd/stampede_definition_oxford.pdfIn PDF document text
    • http://ributufukepun.66ghz.com/xcode_10._3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380700/normal_5fcff067d045c.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/iijaQth/construction_project_management_jobs_in_atlanta_ga.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/jgjgIrX/41643018253.pdfIn PDF document text
    • https://cdn.sqhk.co/detokelixipi/gjjiOie/chocolate_recipe_with_cocoa_powder_and_condensed_milk.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/hKjhlYx/tiktok_followers_and_likes_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/gjigEig/xapajulosusemukasupize.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/RijigoE/download_game_micro_machines_v4_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nokenamepewu.epizy.com/google_se_play_store_karo.pdfIn PDF document text
    • http://nekezoxugi.rf.gd/how_are_you_enjoying_your_weekend_answer.pdfIn PDF document text
    • http://kudugumokob.epizy.com/merasolizaf.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_off0000dfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCF 5256 bytes
SHA-256: 92491a89c1fb6753788bb21eafd492d67236be17dd302ff9ebb876bf642d1aa8
font_01_sfnt_off0000f1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 10720 bytes
SHA-256: 733fe318bc227c67227f89e31cd781d2a3f280a4149422e4cb82469674af663f