Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8650ab5a118ac22…

MALICIOUS

PDF

43.5 KB Created: 2021-05-14 20:31:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4c74d4f9c309aeeacf826abecf9e2786 SHA-1: 207e9dd1fd9597b787dd92db009eb0ccf6eb5663 SHA-256: b8650ab5a118ac22f922ed4a66e048bb40137d592bff4579ead9b7dbce95cc59
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9969

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.xyz/app/431946152/roblox-free-robux-hack-game-hack PDF link annotation
    • http://thamelinn.com/userfiles/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/easy-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/javascript-free-robux_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_003_off00004996.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4996 26660 bytes
SHA-256: 195cf1a474d5d6207b020e420ff2b28d27c1cbe1268f1be3596d114532441fb3
font_01_sfnt_off0000871f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871F 18488 bytes
SHA-256: 44072fbb5c45a7604268a2c6438126b7db3492802a9c8847ecb07522db400813

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