Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf0c95c70d3acfa…

MALICIOUS

PDF

58.9 KB Created: 2021-06-03 09:45:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a9a165041e0a8f9cf778c5ff63eada5a SHA-1: 5f7ccf8373534ed2370be161b55b35908ea82538 SHA-256: cdf0c95c70d3acfadb1e36c8332fe60f977678d19f4f58b549783cf86eaa1c2a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed as lures for game hacks and free currency generators. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically flags this behavior, indicating a high likelihood of leading users to malicious sites. While no scripts were extracted, the embedded links themselves serve as the primary attack vector, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9504

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/reddit-coin-master-free-spins-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000585c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x585C 26904 bytes
SHA-256: 43bb918fe24ecc6168ee8bd22647e8e95b8b24342f04406242aaac7428796ce6
font_01_sfnt_off000097df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97DF 3088 bytes
SHA-256: 21947db80f63681192ff4d23c9293372afcdd8455d0079c5ca62ec2c2320d79e
font_02_sfnt_off0000a2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2AA 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000b5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CF 18060 bytes
SHA-256: ccf5ccc44795e70c5c18ecb3356edd3211558c7f4a4929a106554d4b04000f5d
font_04_sfnt_off0000d71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71A 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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