Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13596b34fba4593…

MALICIOUS

PDF

36.8 KB Created: 2021-07-05 20:49:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9ced0c04db209c2e6c0cf589fd6157c3 SHA-1: 6347730569276d127b040a1c37d63d931d62e062 SHA-256: d13596b34fba45936f4573a26573a1ea7a2b5ded6da1deefd17a4e2cd3551cb1
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/coin-master-time-speed-hack-game-hack PDF link annotation
    • http://library.stiks-tarakanita.ac.id/repository/roblox-hack-2021-noclip_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-hack-use_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/get-viral-on-tiktok-free_GM835599320.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/pubg-4all-cool-20219-uc_GM1330123889.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-roblox-face-mask_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/wurst_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/hack-in-roblox-como-hackear-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/hack-mad-city-roblox-cpat_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/pastebin-robux-2021-hack_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.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_off00003071.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3071 22296 bytes
SHA-256: be1e40beb29e14ff2df4d469db1cce6eba0e6c2830ff4dc035333b93724de376
font_01_sfnt_off00006212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6212 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF7 18616 bytes
SHA-256: b78bd3f69c7e286ccbc6741afddc706e6f1c4a4cc092b12879ca9553ef35e782

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