Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2c16c4fdb8220a…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 17:18:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8fbc1a97fa977e589eaf2b1501ed0b9a SHA-1: da3ca99851c73821e2b8ffc73ab13a247192e95c SHA-256: 3d2c16c4fdb8220aabf926901c7889ac5affe9a955088e5d67432e0937bed087
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 0.9980

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/835599320/is-tiktok-free-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/cheats-for-roblox-on-androud_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-bugatti-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-ghost-hack-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/fastbux-me-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-org_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/pastebin-roblox-account-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-glitches-and-cheats-for-lumber-tycoon2_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-n-ame-change-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/account-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/como-tener-anti-gravedad-en-roblox-hack-check-crashed_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
stream_002_off000031ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31EF 22212 bytes
SHA-256: f1d33486df4b6ef542e1ab3588c8cf9552afdb49ba0f18f49288a60918daee87
font_01_sfnt_off000062f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 17972 bytes
SHA-256: 1ad9b968f8d868dc9306eb656e42f80411177ac895833eed5c4e9bc3c7375aa9

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