Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1c898d3ae14bc9…

MALICIOUS

PDF

34.2 KB Created: 2021-07-02 06:45:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 096c2ea4d0b0b671dd6c0d26231538c8 SHA-1: b0979c08c8b23700968c0debf537605e0f13f4b2 SHA-256: 4f1c898d3ae14bc9778ce84c3efff8d808a25af41358151b6431ec1ae67e4421
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, masquerading as "free generator" or "game hack" lures. These links are designed to trick users into visiting potentially harmful websites. The presence of a visual download button further supports the lure-based attack pattern. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

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/youtube-free-robux-hack-glitch-game-hack In PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-nike-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-free-face-accessories_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-redeem-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/cheat-buddy-roblox-download_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/learn-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-hack-2021-for-computer_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-a-piano-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-glitch-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-hack-client-pc_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-robux-inspect-no-waiting_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-in-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_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_off00002ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEB 22576 bytes
SHA-256: e2e96b312da4e4d3babfecd9caba1fbc15634115c7e747e1fd0c0d679b8ff6b2
font_01_sfnt_off00005f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F67 19512 bytes
SHA-256: fe9b9448eb2b8569102f0ec75cce80365fea66d35c782237615d36c712076663