Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aaad619491d1a73…

MALICIOUS

PDF

78.5 KB Created: 2021-02-04 13:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 12237caf820643b9825cca4a595703e0 SHA-1: eae83eb57ce510b6f422d4dc737ed41c3cf1e809 SHA-256: 4aaad619491d1a738bc65949117b60b60730875e36ba0a3bfdf1a761e7869bfc
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=hulu%20live%20tv%20guide%20listings PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366374/normal_5fc8c62e6c1e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_5fd662a046acf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413567/normal_5fd2df635e7d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445340/normal_5fc9c449d91c7.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/jd1ifib/the_world_of_magic_leveling_guide_ranger.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383137/normal_5fe2454f4992d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366043/normal_5fd04fe3b782f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471249/normal_601b2effdd1d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412174/normal_601b3caac10ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418746/normal_5fc6da1ff09d7.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/hfggVgc/51663406891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_601862a895fad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_5fd0e1c51429c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_601b6500d7776.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/wejuvono/league_of_legends_bang_bang_apk.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_off0000f7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EB 4708 bytes
SHA-256: be76355bfada1cf84e3e375dc283a83637586c21cf71ffaf54391eeaede57f5c
font_01_sfnt_off0001080b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080B 11040 bytes
SHA-256: 01210c9dd2c6669ef36735d3beeb41f9d7810ed71cf469dc369db2cecd04cd14