Malicious PDF — malware analysis report

Static analysis result for SHA-256 f403d736c0f319e8…

MALICIOUS

PDF

40.0 KB Created: 2021-05-19 02:37:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d67af725446e4f1c216607c8ed0f0341 SHA-1: 55e366a4009a03b70fc8ee3821ce68ace71f3476 SHA-256: f403d736c0f319e881de39372bd6abbff8125fc1fd0dfb621a0f7265408824f3
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9971

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/835599320/free-youtube-tiktok-game-hack.
  • 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/835599320/free-youtube-tiktok-game-hack PDF link annotation
    • http://rgadventure.com/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/robux_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004611.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4611 23460 bytes
SHA-256: f851e35844ea46a74fb80721320ea05bb5a352cf974161b739d273137531f7de
font_01_sfnt_off00007b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B08 17916 bytes
SHA-256: 6171dc33effd622977a10c77a6c3003b305f708fb97d4ec75e81d13a5f235df5

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