Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f86c65dd0061468…

MALICIOUS

PDF

73.9 KB Created: 2021-02-18 04:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7b15172736088baf48fe98c2517fcf97 SHA-1: 33080a2249e950209b5a50c9887b7c9b8ef4dc3f SHA-256: 0f86c65dd0061468c8bdba0d6b55e5308471bafd841bf1b47462fcde7ed4f697
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/wb?keyword=grounded%20theory%20qualitative%20research%20sample PDF link annotation
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/vetisoreza-gijibupaliful-fiwuravusonu-jaforiru.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/hegiijb/download_game_brawl_masters_mod_apk.pdfIn PDF document text
    • https://xifofenanupov.weebly.com/uploads/1/3/4/8/134857182/wafipekuneki.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/tqjd5ig/monster_energy_supercross_game_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460682/normal_5fe10149a9f12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415742/normal_5ff2dd87314d5.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/yhiLChf/coloring_pages_online_for_adults_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/Vjdhihc/xolosutuka.pdfIn PDF document text
    • https://cdn.sqhk.co/muvenetu/i91hbgi/21776505131.pdfIn PDF document text
    • https://cdn.sqhk.co/wupetutigo/wpWUaia/download_game_fun_race_3d_mod_apk_terbaru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374715/normal_5fef3b8d35c35.pdfIn PDF document text
    • https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/8815073.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/cjajfxS/matchland_build_your_theme_park_apk.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/vogubivajavofu/citra_3ds_emulator_android_github.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/nupapibilabewelupebe.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_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 5632 bytes
SHA-256: e8ba61e893811c7d964aeaf4826376bfd2752819b15279ce290519caa1993dfa
font_01_sfnt_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 10920 bytes
SHA-256: 1037532e68d07c130f389edd87b590c3877b433a9845a3d602f2772c4eb31a9e