Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c08944598ed23b0…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 00:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f959c7f7e20a14ef0ae21dc09d105032 SHA-1: 988dec6b10b40577075e7bf7f2992e0b89a1c455 SHA-256: 2c08944598ed23b08f106f91fccb7f4e3cc2d39a35b3a90edf3305c2e380a7a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free in-game currency to entice users. It contains links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/roblox-how-to-get-free-admin-in-any-game-game-hack, which likely serves as a gateway to further malicious content or downloads. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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/roblox-how-to-get-free-admin-in-any-game-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pokemon-go-free-coins-generator_GM1094591345.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-bc-card-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-robux-for-free-on-laptop-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_off000031e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E3 22020 bytes
SHA-256: 59c4c210314c5ec5d0325b4f51b37fa3ab43cd4d011be6bbd412541966288a15
font_01_sfnt_off000062a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A9 19652 bytes
SHA-256: 2e84915ae049f52442cd5a95c1e1a3c7a478d127f82a54076a9cc7fb02d6bfca

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