Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e52449fc86bc99…

MALICIOUS

PDF

46.9 KB Created: 2021-05-31 01:33:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4bc16a470005406d8b3facf70d0ab7c7 SHA-1: 57cc3ec0cf33dc45b18a1f232188e3ce84a481c3 SHA-256: f3e52449fc86bc99a1d847d3263afce98db58e8f9619c3e10299daf2127ff8ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as download pages for game-related content. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. The document body, though heavily obfuscated, contains URLs that likely lead to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7900

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/479516143/minecraft-mods-download-free-game-hack In PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://prom2m.ru/wp-content/uploads/fsqm-files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000051cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51CB 25068 bytes
SHA-256: cba3b5b8b77888cc08e2efdb734dedfdc1f098bd7482fd1cfd84c4edffc2537c
font_01_sfnt_off00008a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A37 2856 bytes
SHA-256: 8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44
font_02_sfnt_off0000940d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940D 18292 bytes
SHA-256: cdbcc94192cea0c1a32d76b4e8648406db092070658ebd9590606dd52a123660