Malicious PDF — malware analysis report

Static analysis result for SHA-256 515dfa23db59ee10…

MALICIOUS

PDF

48.7 KB Created: 2021-05-11 07:07:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b9f5ae587fb4833586f60d81d5c913b7 SHA-1: cdbfe49016c0eac43677ffcc7cb974cce8fa1a12 SHA-256: 515dfa23db59ee1014ecea7ba6619d180bdc8a6f495ffceb1cbc75c9ee8ed593
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure, disguised as a "Coin Master Hack" generator. The document body and heuristics indicate a lure for game-related cheats, which is a common social engineering tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or redirection attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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 https://netcdn.xyz/app/406889139/coin-master-hack-ios-download-2021-game-hack In PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F2B 24208 bytes
SHA-256: 526bc5ee8ccea3d0ae539a6118d561178408b19da86d544fd7133705da1734d4
font_01_sfnt_off0000863b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863B 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC5 18696 bytes
SHA-256: 11ecf461d2f98c74c154dcc560692411ec3e38438efbd345bccaad7f825d81b7

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