Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f397fbc3eae074…

MALICIOUS

PDF

43.6 KB Created: 2021-05-10 13:15:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 575a82657ea3402d916cbbe61807a879 SHA-1: 1d4e3c6ffed0d43ef34634d9b659eaccfd50f649 SHA-256: d8f397fbc3eae07428b82e2d43135e40d00c5eeec144f8c46a4f31cb6f66a59c
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 external URLs. The presence of embedded URLs and a 'game hack redirect' heuristic strongly suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to facilitate malicious redirects or downloads.

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/how-to-get-20210-robux-for-free-game-hack PDF link annotation
    • http://pspmrsmbpulau.com/opac/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/100-robux_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-minecraft-bedrock_GM479516143.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_off00004d43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D43 24960 bytes
SHA-256: 76d3570b1f1ffb2889f68c0657d8c1adaa1c62450ee75ee83d9f5c5b37c27e21
font_01_sfnt_off000086f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F2 18684 bytes
SHA-256: 6e9c0eecafd635f65838c8dbfb1e23e8457e4c9239d4b33e445d621fd980b18f

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