Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2de53931954a579…

MALICIOUS

PDF

45.0 KB Created: 2021-06-10 23:30:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f5311f1ab65d99f6b4094cc60711dfbb SHA-1: cb7252a27a57783b11df588b753d4b3f177661ca SHA-256: a2de53931954a5791cf023de8563cd3ad2eb400de50a9e165b1b7487aeb67541
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators' for popular games like Roblox. The primary link, https://netcdn.tw/app/431946152/good-hacks-for-roblox-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a lure designed to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/good-hacks-for-roblox-game-hack In PDF document text
    • https://www.gvandenakker.nl/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/roblox-scripters-for-free-help_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/robux-games_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/how-to-gert-free-robux-no-human-verificaion_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-roebucks_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_004_off00004e9f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E9F 26660 bytes
SHA-256: b2274370c6bd3f0a45c916693217426bff6097c950660d93f1bc3af1fff18481
font_01_sfnt_off00008c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6B 18520 bytes
SHA-256: 4cac79f025c3b294a55fef69523f49dbf853107c77da0a61ab788e852231b0d8

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