Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c806bec4c6bd5d…

MALICIOUS

PDF

35.4 KB Created: 2021-06-26 03:04:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 03b3d48b1cb9e40aa7aa460d13602fbe SHA-1: 39c476bf3f3cbbacc7c72a2ee1c33abc3f2f298a SHA-256: 19c806bec4c6bd5deedd939f6c6d7fd21bfa121e8558200b701a221795f5dc27
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, masquerading as game hacks and free currency generators. The document body and heuristics indicate a lure to trick users into visiting these malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the primary attack vector is the redirection to malicious infrastructure.

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/hackear-meepcity-roblox-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/catalog-roblox-free-items_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/synapse-executor-roblox-x-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/best-way-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-in-less-than-1-minute_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-trolling-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-in-roblox-using-cheat-engine_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_off0000323d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323D 22396 bytes
SHA-256: 0042e190a8f90bfddcdc7049c27423373e29ecf521b968ce8bd556478005fb69
font_01_sfnt_off00006410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6410 19432 bytes
SHA-256: c875336ad7393ae9f103aff13b42d61f12969b5990faa6db6630e32e1fe715f2

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