Malicious PDF — malware analysis report

Static analysis result for SHA-256 15865e195aa8225c…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 07:34:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0dce46318894d8772adfb1a8a25444cc SHA-1: 4967d37a98fc98bc3a0ba1a0085e69c5429ed2b3 SHA-256: 15865e195aa8225c56dd3a459aa2e7df11df204fbd145e1b65097705535e6b7b
160 Risk Score

Malware Insights

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

The PDF contains a lure for free game hacks and generators, directing users to a malicious URL. This is supported by critical heuristics indicating a redirector link and a game hack lure. The ML classifier also flagged the document with high confidence. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or redirection attack.

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/free-roblox-characters-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/pubg-uc-ykleme_GM1330123889.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-vehicle-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/best-free-t-shirts-in-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-speed-hack-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/code-de-cheat-roblox-simulator-de-chiens_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-call-meh-bob-roblox-youtubecom_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-free-robux-real_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/husky-free-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_off00002e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6E 22156 bytes
SHA-256: 2bcb2f0e1ed8a1a78ece60479134647e0e0ae056fccd3f1e3a30a2f8f972334b
font_01_sfnt_off00005faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAA 18920 bytes
SHA-256: f5e38632de1cb8bfdf796bc872df6d19c2691b2634d989ea191675e2d28a5d2f

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