Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f35d266da2014d6…

MALICIOUS

PDF

35.4 KB Created: 2021-06-22 22:40:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a3cdd1f96e65e39eb0bce12d52043d13 SHA-1: 65c8085be4652367edda720d51209fcbb1bc6085 SHA-256: 9f35d266da2014d692420e094560cbfbf588c1de722e2c6d2c8e2c6de7d1d5d6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body, though partially corrupted, contains references to these lures and associated URLs. The presence of these links and the heuristic firings strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful content.

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/lawn-mowing-simulator-roblox-hack-game-hack In PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/descargar-hack-para-roblox-dragon-ball-rage_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/code-for-generate-free-robux_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.med-aid.vn/ckfinder/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000323e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323E 22256 bytes
SHA-256: ea5f4c898e86e3d9d92ce0a924fdf5024a2fb9f55e0c08d3d55092766027effd
font_01_sfnt_off00006391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6391 19640 bytes
SHA-256: 78236b50278668e26bad5f91a19a7c5711fea49445f35a5ba070798ff332c5af