Malicious PDF — malware analysis report

Static analysis result for SHA-256 e600a6ee1d9319f5…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 16:53:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 11813d054d0b460718dae2e910b3e29d SHA-1: d4e4692ff5597bc2ad032937bb82943abac6e35a SHA-256: e600a6ee1d9319f5727ccf51523fb78b3906e4fee88dbf2908ffb03400a691de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures for popular games. The document body and embedded links strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of numerous malicious URLs and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic indicate a high likelihood of a phishing campaign.

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.tw/app/406889139/coin-master-free-spins-hack-game-hack In PDF document text
    • http://library.acehresearch.org/repository/roblox-accounts-getting-hacked_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/claim-your-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/gamepasses-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-2021-unlimited-codes-for-kids_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/2021-free-robux-hacks-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/clicker-series-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/god-mode-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-fps-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-speed-hack-script_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-robux-hack-without-survey_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/site-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/i-got-this-shirt-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-codes_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_off00003305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3305 22804 bytes
SHA-256: 3539c314dccef461e89a4536f74127b7116edf4b6860df767b6950809a82e209
font_01_sfnt_off00006610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 18344 bytes
SHA-256: bda74eba5f039297e511dddd57f660cdccd001576784cab1ba2dc4ebdf08fb85

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