Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab244431f0d5a1e…

MALICIOUS

PDF

37.6 KB Created: 2021-07-06 12:05:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: aa466db6a0cf409d9e375f750b3fc0ef SHA-1: 6029aa3c4661739abc5246c0f2db74cbf33c07f0 SHA-256: bab244431f0d5a1ede26031d8cc3d6ae3e64da0c487936dbe61bd075bc413d23
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/406889139/appsmobinfo-coinmasterhack-coin-master-hack-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-stuff-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/adds-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-elemental-battlegrounds-hacks-win10-2021_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/how-to-hack-accoutns-on-roblox-october-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-real-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-exploit-download-free-no-virus_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-and-catalog_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-access-the-studio-of-a-roblox-game-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-coin-master-stuff_GM406889139.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_002_off0000316c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x316C 23108 bytes
SHA-256: 0fbaa245e39373389041837304b6a4f4dd47d573430f62dc2e58b48e52a41069
font_01_sfnt_off00006548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6548 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00006ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE7 18764 bytes
SHA-256: 59b05cf49ec26ce95dbcd7334d1e86eab09a9bb7e2639765bb6964a9511261fc

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