Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9439217d92b9af2…

MALICIOUS

PDF

79.3 KB Created: 2021-02-23 19:36:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d6722677d661bfa7e6b1217801433a2f SHA-1: 3efcaf8ac2a23000271a2c66238793d784b22fb1 SHA-256: c9439217d92b9af2f5b466905d507fdc9a413841c53a03e584f9ebd2d95c8b7d
136 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
  • 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://maypoin.ru/123?utm_term=handmaid%2527s+tale+cast+ages PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496582/normal_5fe81c4b3c587.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/sjaiamX/72120140943.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/7hdhihh/download_game_real_bike_racing_3d_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_60200be40afd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_601a12b228390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_601539116b170.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/WiiFjOt/cloud_browser_premium_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/hiGh4ag/5774413083.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/tjcSjbg/88564593012.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/z83ibB3/value_city_warehouse_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/6hc7uFg/xotiwuzoxif.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/nimuwet/79358035820.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/data_science_ms_usa.pdfIn PDF document text
    • http://diribiboturo.epizy.com/venapozakikoxiwiletam.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/application_x-_www-_form-_urlencoded_json_ajax.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_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 5160 bytes
SHA-256: 1099f0c30c3327e1519d287da6fb02eae3a21442cc580f80d6b8e6868c2435a9
font_01_sfnt_off00010c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0A 10764 bytes
SHA-256: bcc9e1c362135e9e63ec8b425ff4b805d1fd997af856a7e078e949eddb53ab75