Malicious PDF — malware analysis report

Static analysis result for SHA-256 d067387a28f948d4…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 05:58:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 05b8c78e3943f98e6606768bae087247 SHA-1: 36415b360928d4a60c886fbc2bca4af6fded2c55 SHA-256: d067387a28f948d428cd3d84118b2c018d89f03927de7a3e9c7d3af90457f85d
200 Risk Score

Malware Insights

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

The PDF contains a lure for game hacks and redirects to known malicious infrastructure, indicating a likely attempt to distribute malware or phish for credentials. The document body and embedded URLs strongly suggest a social engineering pretext related to online games and generators. While no scripts were explicitly extracted, the PDF structure and heuristics point towards exploitation or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/406889139/free-coin-master-coins-and-spins-game-hack In PDF document text
    • http://library.acehresearch.org/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/impact-minecraft-hack_GM479516143.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
stream_004_off000050ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50AE 26920 bytes
SHA-256: 1403be50549a28d4cae3c02ec8b63110bc9ae4636a45dda32629ba84684530e4
font_01_sfnt_off00008ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE8 18060 bytes
SHA-256: 11bd500b33c169b65e53ecddb4cd7ac7428d9a9bdc32d60ba78f45c9260aee9d

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