Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1497bbe3a9a4ca…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 14:36:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 020b2351aaf881f5ca4034a8f0c02083 SHA-1: 2070001f94e62ee52436a0d293bd1ef9523ed437 SHA-256: 2c1497bbe3a9a4cac62ff7bc98c053248c7ea0b6cdd788d5eec6aec7ed3f397d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free spins. The primary link, 'https://netcdn.online/app/406889139/free-spins-for-coin-master-app-game-hack', is identified as a malicious redirector. The document body and heuristics indicate a lure for potentially unwanted or malicious content, likely to download further malware or engage in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.online/app/406889139/free-spins-for-coin-master-app-game-hack In PDF document text
    • https://library.kysm.edu.my/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-daily-free-spin-app_GM406889139.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
stream_004_off00005090.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5090 25164 bytes
SHA-256: db5f7a1e1b274e148e6ffc08fb2e13975046a33853c8ca4be902ae84a975596e
font_01_sfnt_off000089ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CE 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9381 17884 bytes
SHA-256: c0e07e045f0496ba68af439e810d5bb13e23b0d850ef9426c095223eaa712aa7

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