Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa601c3aa65df4ca…

MALICIOUS

PDF

46.5 KB Created: 2021-06-08 22:10:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6f859f91869b6db9fe9bcdeba54f356a SHA-1: 208b634fb32d45945b74b5045709e0bb67eca59d SHA-256: fa601c3aa65df4caa9a7a3e6c8fbf057895b1ce65dca78ddb2ec66ad2ea884a9
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9748

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-exploit-hack-2021-game-hack PDF link annotation
    • http://svadba-moda.kg/images/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-did-someone-hacked-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-v3rmillion-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-cheat-on-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-hack-roblox-accounts-2021-inspect_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/get-free-robux-roblox-2021_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://svadba-moda.kg/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-jailbreak-hack-2021-september_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/cheater-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E3B 24548 bytes
SHA-256: af570600bd81dd849cc01dc1f587af5b32adb1fed51c05094dfb056d04832afd
font_01_sfnt_off00008680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8680 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9090 18984 bytes
SHA-256: 2f4bb2884ee0a8a1f6380d14f9a235fef1d8075f602d9e3819b7bbfce404fc1c

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