Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b44db1f1ccf6ab4…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 01:10:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 366ed60aa39f000f55fbbc85c99a5d4a SHA-1: 48919cb9644b3c64c6a0eacdaa0624121944c739 SHA-256: 6b44db1f1ccf6ab41a4314d3dfe522a402a2f34c7950a741c2551d70023c052d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising free game hacks and currency generators. The primary redirector URL is http://netcdn.tw/app/431946152/www-roblox-com-robux-free-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a lure designed to lead users to potentially harmful content, likely as part of a phishing or scam campaign.

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.tw/app/431946152/www-roblox-com-robux-free-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/can-you-hack-roblox-for-rebirths_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-fake-hack-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-2021-on-phone_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/tiktok-free-followers-and-likes-apk_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/exploit-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-jailbreak-hacking-apps_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-free-robux-pins_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/jeux-de-hacking-sur-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-groups-to-join-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/abs-roblox-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hacks-for-prisone-life-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-lua-hacks_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-state-of-wrttemberg-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
font_00_sfnt_off00002fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCA 21876 bytes
SHA-256: ab8706f461ac1f4c8a0e997d1133ab61b96396a8591a77fc5c66160ca72c9c32
font_01_sfnt_off00006029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6029 19412 bytes
SHA-256: e3c8c7c2ff0f885c816f02c31cddbc793d7a6ff74f38847110c716c7ceebbac0

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