Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a192d4bb425577…

MALICIOUS

PDF

32.8 KB Created: 2021-07-19 16:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0493cd8b7c1881102ac5761870b7e734 SHA-1: 662396f949e0edc7522217064778999ccf2950c6 SHA-256: 23a192d4bb425577145100bb3f9366647304fdc457511179aceb8f5691c47c8a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a "how to hack" lure to entice users to click on a link. This link, http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-2021-game-hack, likely leads to the download of a malicious payload. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple suspicious URLs further supports this assessment. No scripts were extracted, but the document's structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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-accounts-2021-game-hack PDF link annotation
    • https://alarmed.pl/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://alarmed.pl/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://alarmed.pl/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://alarmed.pl/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://alarmed.pl/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://alarmed.pl/images/minecraft-bedrock-hacks_GM479516143.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_off00002ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD6 21984 bytes
SHA-256: 1df6817d17fef110aede1ac99a5e5d5c5feee4951c54acee97300ba7ee375519
font_01_sfnt_off00005b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1B 19176 bytes
SHA-256: 6f1be2f53e78d2232c4cc8701dc2ebda7fd96dce4e81a36b526c0c8f5bd1c790

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