Malicious PDF — malware analysis report

Static analysis result for SHA-256 395cbaf83163af40…

MALICIOUS

PDF

72.8 KB Created: 2021-02-19 12:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cf8e0f0c064898568dded1dc0e2ee99b SHA-1: 7bd75df2b49fbdb096decffc139b275b2f3c0e7b SHA-256: 395cbaf83163af4001d7904e39179decd341c44486798616d1b0d43bf3398b00
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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/wix?keyword=slither.io+mods+free+play PDF link annotation
    • https://cdn.sqhk.co/nifodotiriru/c6Ii1bg/slice_arena_monroe_wi.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/fjhVF0D/space_pew_pew.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/haCghGH/rhythm_trainer_app_review.pdfIn PDF document text
    • https://tapuroxoj.weebly.com/uploads/1/3/4/5/134599682/1346402.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/Nhcidih/archery_trick_shots.pdfIn PDF document text
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/zemirabekux-kofasutokub.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/hjjV1Qp/dadorujesekidipoluzuja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406473/normal_6000bd4c7ecc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452373/normal_5fec7113caa21.pdfIn PDF document text
    • https://romenugerod.weebly.com/uploads/1/3/5/3/135317494/9d699998b9b.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/xomudufe/bed_sheets_queen_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/scholastic_guided_reading_benchmark_books.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/25557816713.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/67805506151.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/aha_clinical_guidelines_coronary_artery_disease.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/hr_gap_analysis_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/69954304246.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_off0000e0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A6 5516 bytes
SHA-256: b5053c57b72e55364ce8acb88cfbb18b68bbaa37f72e05e1a6d4a7912fb514b5
font_01_sfnt_off0000f342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 10172 bytes
SHA-256: a1db7b93c005e1dd00ba22db3eeb91d760cdab03692bc68010ece31382e31fb6