Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a895b2314106de…

MALICIOUS

PDF

47.6 KB Created: 2021-05-12 17:10:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 78e1840ca52517aacc70c14e0c8fe161 SHA-1: 9902193a0521d932391f035daf67f489accd536a SHA-256: 48a895b2314106dec634042cb482051103600224230c04c4ceef8604914fd87f
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 0.9013

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.xyz/app/431946152/no-scam-free-robux-game-hack PDF link annotation
    • http://3dmedicus.ru/images/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://3dmedicus.ru/images/claim-robux_GM431946152.pdfIn PDF document text
    • http://3dmedicus.ru/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://3dmedicus.ru/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://3dmedicus.ru/images/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://3dmedicus.ru/images/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://3dmedicus.ru/images/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://3dmedicus.ru/images/roblox-weird_GM431946152.pdfIn PDF document text
    • http://3dmedicus.ru/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://3dmedicus.ru/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://3dmedicus.ru/images/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://3dmedicus.ru/images/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://3dmedicus.ru/images/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://3dmedicus.ru/images/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://3dmedicus.ru/images/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://3dmedicus.ru/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://3dmedicus.ru/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://3dmedicus.ru/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://3dmedicus.ru/images/give-free-robux_GM431946152.pdfIn PDF document text
    • http://3dmedicus.ru/images/instant-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_003_off000048f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F3 29552 bytes
SHA-256: 86ba1815d4e3d15541619db3417727307217565f2df2e6907ef0fef42ba2a9ea
font_01_sfnt_off00008d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D28 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9737 18500 bytes
SHA-256: 028f53d29b1a624cb68bae5e747b7c177b5cbf8f783d4c53e2642c12f49f399d

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