Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd372ea872d3d4a7…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 06:18:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 36b84770203790b97c24364a40f548bf SHA-1: 0944fd3d26bb47b6adb938bcb125bf9dad7fc1aa SHA-256: bd372ea872d3d4a72ab312698acf44da336c00a508f7437fbd671bb62125226f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics indicate a lure for game hacks and free currency, aiming to trick users into visiting the malicious URL. No scripts were extracted, but the presence of embedded URLs and the lure suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-hack-a-account-roblox-v3rm-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-online-free-play-now_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-coins-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/descargar-roblox-hack-robux-mediafire_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacks-for-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-peoples-passwords-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DD 22436 bytes
SHA-256: 4c09af3395546c5fb99ccfd4ac691bc77ba6273d61fa45852249c29d0fc245ed
font_01_sfnt_off000062e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E8 19632 bytes
SHA-256: 4710632d61b45812ca1b4f5e18680e6b83190ba5d2a4081b0df85f3218867439

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