Malicious PDF — malware analysis report

Static analysis result for SHA-256 f702d1869641ea46…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 15:52:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 75527bc5ee14ac3a2e25cfc6e7740f1f SHA-1: 5d86ce995ba5243faf78dea9731f3a0d938fd7a8 SHA-256: f702d1869641ea4650a1649565f32e8d8e514db761750964de03a8affa3dbd4d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and a large link farm, likely intended to drive traffic to scam or phishing sites. The document body and extracted URLs indicate a lure related to game hacks and generators, such as Minecraft and Roblox. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attack pattern involving user redirection, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/479516143/minecraft-java-edition-free-game-hack In PDF document text
    • http://library.acehresearch.org/repository/como-tener-robux-gratis-sin-hacks-ni-inspeccionar_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-scripters-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/get-free-roblox-hats-not-patched-working-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-free-3d-online-gmaes_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-hacks-tay-take-off_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-hack-roblox-usesing-python_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-2021-easy-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/descargar-roblox-hackeado-para-pc_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-faces-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-login-free-robux_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_off00003381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3381 21932 bytes
SHA-256: b05d4c2a85f4bc23c1ff1951eb2bade5e6d6b2f898109d07bbf02f9d6d75a30e
font_01_sfnt_off0000638e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 18452 bytes
SHA-256: c88fc963111c99bd76411e48cc5f7a93ca1ac40d038cb8251833f774ecd296b3

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