Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f40291592fab539…

MALICIOUS

PDF

34.2 KB Created: 2021-06-30 09:25:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7808a6080872870826a2ec6717530711 SHA-1: 284778ccefed60564874ddf0dd3a3c768def9f1e SHA-256: 3f40291592fab5399d1bddf16b087de24da06ad9b0019ec412a71e87c3d6d78c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a malicious domain, masquerading as game hacks and generators. The heuristic firings indicate that the PDF links to known malicious redirector infrastructure, and the document body explicitly contains the primary malicious URL. No scripts were extracted from this sample, but the overall intent is to lure the user into clicking the malicious link, likely leading to further malware download or phishing.

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-roblox-jailbreak-hack-keycard-game-hack In PDF document text
    • http://library.atim.ac.id/repository/roblox-lumber-tycoon-2-cheat-engine-download-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-do-speed-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/sites-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/dinosaur-simulator-roblox-dna-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/join-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-assasin-hack-script-2021-unpacthed_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/goud-info-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-gravity-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-hack-download-app_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-roblox-in-three-simple-steps_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-plane-blueprints-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-blue-hair-com_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-use-cheat-engine-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-100-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_off00002e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E23 21912 bytes
SHA-256: aefc0ab7d3b189ca763407b563971aeab65b672f38075e8a95e2d80e0d42bfc0
font_01_sfnt_off00005e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E86 19700 bytes
SHA-256: e807b095e6b5e08455730964151f98a953b26bc71bc09e46e0755d303f623ad3

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