Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6ef830ca9f0530…

MALICIOUS

PDF

39.5 KB Created: 2021-06-10 23:30:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bea896985121549624ec83dceefb3172 SHA-1: 100fc337c502699eef43196fb68f471e05203e9c SHA-256: bd6ef830ca9f0530910c0e71aae91e41ee3bc6a579de83d3011c2680438ee337
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 3

  • 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.
  • 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 https://netcdn.tw/app/431946152/how-to-get-5-robux-for-free-2021-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-hack-on-phone-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/rbxdemon_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/village-3-coin-master_GM406889139.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_004_off0000520f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520F 28872 bytes
SHA-256: 3203fe85f8a78d80d5a9eda76f9e68ec1df9d9eb096c86e615f55fc3b2912143
font_01_sfnt_off000093dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93DD 2884 bytes
SHA-256: 2d18477cf02c3d021dceb7d1cf159157d9e95d38bcc7e840cb4034911ec14998

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