Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c70b2bf0ed32ed…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 13:13:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 395e045a81fdd40b44198cb9398887b8 SHA-1: 3937731c6d39635ee2e3e32c5fa60248ea3aa3fe SHA-256: 44c70b2bf0ed32edcf35e6c6a343a3fc963af21f904ca1784b899d7226f34af0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a download button, luring users to a website offering a 'free generator / game hack'. While no scripts were directly extracted, the PDF structure and embedded URI heuristics indicate a malicious intent to redirect users to potentially harmful content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/479516143/minecraft-bedrock-edition-pc-download-free-game-hack PDF link annotation
    • http://www.digilib.uim.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/pokemon-go-free-revives_GM1094591345.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-hack-fast_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_off000050e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E2 28680 bytes
SHA-256: 8c475fd0d0fd8fdb8ea99e65e124aeac0e1cc6447934d6ffb3ff9d63c2358249
font_01_sfnt_off00009109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9109 2824 bytes
SHA-256: 32afe7424993ed77feed76f83a3afdb3d3391dbb877b7f4b0d7509f28dd06233
font_02_sfnt_off00009ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB0 18828 bytes
SHA-256: bab883dfc84e1a3f345dfae0998a7e69f5c6c1aec602e5a20de586714fc0e9f0

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