Malicious PDF — malware analysis report

Static analysis result for SHA-256 22dbf25c607edc40…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 09:49:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3c03d757d9900f892241ff6ba6f9dc08 SHA-1: cc4cb26552095c9db2390582056cb4eb53ba4ade SHA-256: 22dbf25c607edc4078711b9cfc0049d78e621c37c560fb42527a98bc652e005b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack lure, directly linking to a suspicious URL. The document body, though partially corrupted, also contains references to game cheats and the same suspicious URL. This indicates a likely attempt to trick users into downloading malicious content or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/roblox-cheat-robux-game-hack PDF link annotation
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/roblox-free-roblox_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_off000050f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F8 25704 bytes
SHA-256: 39a4e4d28ab2dbecbcedc3f6f196dfa06e2cbfd8e3d25b4fc10d6e06f13bcf94
font_01_sfnt_off00008c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1D 18424 bytes
SHA-256: a96f43e65daf9623fa7b9bc259dd656765653644365f0d7d49582fe5e9502473

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