Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb6f65a047554b6…

MALICIOUS

PDF

68.8 KB Created: 2020-11-09 23:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: cc2e05ce42c88a94de720a2be4b5d9b2 SHA-1: bdb346c5875bed9c791929ae7db27fface4e6f92 SHA-256: 5bb6f65a047554b6e358f9ce5255048247d800209f6e36633fe1207ba4838cf8
294 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://traffking.ru/123?keyword=edge+browser+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5f9466fb26cf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_5f8f376ec0930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f971fd962569.pdfIn PDF document text
    • https://jugidemavewug.weebly.com/uploads/1/3/4/2/134265355/borigifimuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f879f8fde09a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6193fc2d-cfd7-45ad-848b-c39aadb4aa78/92770972415.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/unblocked_games_territory_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8ef2ac-a7f2-4918-8438-2b714ec0166b/27443961374.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/20764012515.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/65372504939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc99de12-48f3-4a5f-9b80-961622458011/18026790453.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/into_the_wild_study_guide_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/map_of_africa_with_capital_cities.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/17835613328.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_off0000d190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD190 5380 bytes
SHA-256: e0682056b239db6b280a8a7f3f7eebec53e66b866e914e2b9ac7aa6227c39c56
font_01_sfnt_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 10108 bytes
SHA-256: 6ffd87e199296c981fe7f0c97b5bdd14d3455473635126fee177d0e06a929c17

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