Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb75a43b188f0dd…

MALICIOUS

PDF

42.9 KB Created: 2021-05-19 01:03:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 585aad94fdaca3c426f0c43ded051b33 SHA-1: 18baea73dbe32bbc85c7bf1b125e9924ec56a84f SHA-256: fdb75a43b188f0dd268cf9c3f750090d0116d3a68c2828e09d788c178dd9907a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and game hacks, directing users to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to potentially malicious content. The primary IOC is the external URI used in the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-games-that-actually-work-game-hack PDF link annotation
    • https://seedungo.com/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://seedungo.com/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://seedungo.com/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://seedungo.com/images/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://seedungo.com/images/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • https://seedungo.com/images/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://seedungo.com/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://seedungo.com/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://seedungo.com/images/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • https://seedungo.com/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://seedungo.com/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://seedungo.com/images/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • https://seedungo.com/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://seedungo.com/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://seedungo.com/images/free-robux-link_GM431946152.pdfIn PDF document text
    • https://seedungo.com/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://seedungo.com/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://seedungo.com/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://seedungo.com/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://seedungo.com/images/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_003_off000049c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C5 24336 bytes
SHA-256: 1e8151f34415caa0f2d6c0fd778d2fbb4c12f5987bd0ae883e28af4cb102c7ce
font_01_sfnt_off000081f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F1 19392 bytes
SHA-256: 2bd118a57b53ff37cab680797aee460eb59fed046ceba4ed0277135d7eae5baa

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