Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9537eb3e415da7…

MALICIOUS

PDF

36.9 KB Created: 2021-07-05 23:11:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d1ca63c02876db16871aa123e91f67a8 SHA-1: f242f9bd8efc722d4de52776e55de4e32a48e56c SHA-256: ca9537eb3e415da74d18b3ca825699005db1283258920ea138acde8f3da7cfec
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.tw/app/479516143/minecraft-server-free-trial-game-hack PDF link annotation
    • http://digilib.akbidarrahma.ac.id/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-hack-roblox-on-macbook_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/hacker-wallpaper-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-cheats-for-laptop-jailbreak_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/damlouk-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-credit-card-free_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/robux-hack-2021-proof-no-inspect-element_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-obc-and-robux-in-roblox-working_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-games-in-roblox-100-real_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-minecraft-website_GM479516143.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
font_00_sfnt_off00002eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEE 21972 bytes
SHA-256: 32ece4c8595f2384d0a7deaaed7db867cc7abe72c072a8173c9c700c330fae38
font_01_sfnt_off00005f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F48 4440 bytes
SHA-256: 6a4c6a8bb716d5784c68a8817fe27c80ea0201b5e507a09cdd5e8064225e100b
font_02_sfnt_off00006e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0E 18044 bytes
SHA-256: 5a296e18dbf65f04870817c9dd6793c8643020e9f41ce66c5e33f12cc84b0da1

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