Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bf98b2556fb568…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 12:48:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 08d45fb30b62061b301586dcea84f978 SHA-1: 53795ed6bcdd6ffd63bf8e6d396fe07b2124463c SHA-256: 94bf98b2556fb568e8c47a7387e86bb950f634ade695e64628a7823abfb42202
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and generators. The primary lure URL is http://netcdn.co/app/431946152/neil-free-robux-game-hack, which is flagged as a malicious redirector. The document's content and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful sites, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.co/app/431946152/neil-free-robux-game-hack In PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/robux-hack_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/133-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-bandit_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-live-2021_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
font_00_sfnt_off000031d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D8 21800 bytes
SHA-256: 82420c7a6d528329962355d31becd995a44831b1226be2369b0cb8a2cff23694
font_01_sfnt_off000061f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F6 18912 bytes
SHA-256: 8a256bb236fc5d191fde72358f112180913b9cf32a7046c94be6a9cccd139889