Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b9af81f113207c…

MALICIOUS

PDF

38.3 KB Created: 2021-07-06 00:29:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 268b4799b93e958df33421e31cb956c3 SHA-1: a92e88a0cac0267257989641dafd309785c95a1e SHA-256: b4b9af81f113207c2d152026ed4d21b6ebd1fdac1e749691e70cce0087848ab7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious websites, masquerading as game hacks and free currency generators. The primary lure appears to be related to 'Coin Master' and 'Roblox' games. The document's structure and embedded URLs strongly suggest it is part of a phishing or scam campaign designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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-link-facebook-game-hack In PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-vehicul-simulator-hacke_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-robux-from-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-costumes-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-hack-sprint-simulator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-avatar-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-money-on-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-hack-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/tiktok-freein_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hack-speed-roblox-pc_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
font_00_sfnt_off00003525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3525 22752 bytes
SHA-256: 2dd36e70f46d8061265123cfca99db75b1e715222f7e6dcfd293924c01c08a9a
font_01_sfnt_off00006827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6827 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off0000720c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720C 18504 bytes
SHA-256: 1337bb6b5eb41e794538277b192591b843a781649f4f6c8c9ad65a20b0d90ce7

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