Malicious PDF — malware analysis report

Static analysis result for SHA-256 81db05360aa7f851…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 12:20:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0b282960bca74b14267b1b1e68647d53 SHA-1: cd117ba8abb4b0f1147418e4cb26004d2af2e3ac SHA-256: 81db05360aa7f85124ca86a5152155357edd056217a81d42b6b1908b8e9644b7
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/how-to-hack-roblox-jailbreak-mobile-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/change-name-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hack-phantom-forces-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/april-2021-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-heroes-online-hack-script_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/meme-attack-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-but_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-stuff-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/street-fighting-simulator-infinity-stat-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-for-roblox-without-human-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-alien_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-counter-blox-roblox-offensive-download_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-free-complete-game_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_off00003063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3063 22148 bytes
SHA-256: 4d446cd97fefece124c33312c05732a72f998f4bc2657bed2c6a86255c97c873
font_01_sfnt_off000061cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CB 19116 bytes
SHA-256: f8fd0ace54aee4a0176ef8fe12e08a459e0c6c30757f1b4451d95c0a646cef72

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