Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6cfdcbb3e04d1a…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 16:15:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1a0d3e15e70e1d4192ea78b2170500b7 SHA-1: 2aab50080b44db8104977740380ad326529cbcf8 SHA-256: 9b6cfdcbb3e04d1a07f891a56667d0e3dc510e312034e5fcc4701b87b412f432
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/431946152/tons-of-robux-for-free-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coinmaster_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-ultimte-gamer-365_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/prison-life-vending-machine-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/774-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-nike-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-stuff-in-roblox-ios_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-phantomforces-flame-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-pour-avoir-des-robux-facilemen-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_off00002e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E81 22724 bytes
SHA-256: 0b2f1005f06a43a0422d99d00e718d27f8b206e00bfcebe76bc397128aea7475
font_01_sfnt_off0000619d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619D 18716 bytes
SHA-256: d57db93e4525943bde30b225ee42dd76f297489b4812e7cea35dab32388773bb

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