Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b95406007563d2…

MALICIOUS

PDF

47.8 KB Created: 2021-06-10 20:38:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c5f41a540cfe12e75d461942c9126d42 SHA-1: d94c10fa42260d8d4ec340fdad7570ef2ba7cd88 SHA-256: e8b95406007563d26a9ccdbf25be3131d24ad57bb29cc695cb655519ceb908d2
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 0.9832

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 https://netcdn.tw/app/431946152/design-it-roblox-cheats-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-how-to-get-everything-free-in-the-catalog_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/robux-hack-fake-credit-card_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-but_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-generator-no-human-verification_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
stream_004_off0000549e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x549E 29528 bytes
SHA-256: a1a3862ef671f3fd110a96b1d6bb8223e17e0137935ce89c6f55aff95b49dc45
font_01_sfnt_off000096ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AB 18860 bytes
SHA-256: 19dcbf8bf07142428246b44b4bbbcb5d9a2f7a47a12262256c8530f3dbe142f1

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