Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e05a013bff29560…

MALICIOUS

PDF

33.4 KB Created: 2021-07-19 17:30:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 16991315374f749102aa9ebc3ad33626 SHA-1: e6764c7ec60c33c593bbff5d73172435e0ac210f SHA-256: 9e05a013bff29560f8f5c8b551a83b95270aeaffcf7dde287db147a8d423190e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body explicitly mentions "free spins and coins for Coin Master" and "CLICK HERE TO ACCESS COIN MASTER GENERATOR", indicating a lure for a game-related scam. The primary malicious link, http://netcdn.tw/app/406889139/free-spins-and-coins-for-coin-master-game-hack, is designed to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.tw/app/406889139/free-spins-and-coins-for-coin-master-game-hack In PDF document text
    • https://www.colledellaselva.it/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.colledellaselva.it/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://www.colledellaselva.it/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.colledellaselva.it/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://www.colledellaselva.it/images/minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.colledellaselva.it/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://www.colledellaselva.it/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.colledellaselva.it/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://www.colledellaselva.it/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.colledellaselva.it/images/free-robux-no-human-verification-or-survey-2021_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
stream_002_off00002d75.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D75 23068 bytes
SHA-256: da985077c7a299bb281244ad918dbf7e8a87c5ed1cce820ea682a82e4c940b01
font_01_sfnt_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 18060 bytes
SHA-256: d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51

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