Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8588aef67ad1d1e…

MALICIOUS

PDF

34.0 KB Created: 2021-07-02 08:19:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2bbf6e831c09f18993930d7d9d7171a0 SHA-1: 71fd05ab3e5de8ab7830f5376ddf1e4dc00e01bf SHA-256: b8588aef67ad1d1e91a651d77064317dbed5581661d191cd5720ea9b8e532e11
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items or hacks. The primary malicious link is http://netcdn.co/app/431946152/how-to-free-robux-codes-game-hack, which is designed to lead users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or scam attempt.

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/how-to-free-robux-codes-game-hack In PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/roblox-how-to-noclip-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/roblox-how-to-get-free-packages_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/booga-booga-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/roblox-free-pin-generattor-no-survey_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/roblox-hack-script-booga-booga_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-clothes-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/blox-fun-info-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-hack-lost-world-2021-com_GM406889139.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_off00002ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBC 22180 bytes
SHA-256: 10b86b284ef1df2e3a5c506bba50d326bff820ed557ddacee97f96c6ec285a54
font_01_sfnt_off00005fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD8 19056 bytes
SHA-256: 8eca63da2566501ed21a46c722f7bb3544130afe68ac86ef07e9119c1a94e38c