Malicious PDF — malware analysis report

Static analysis result for SHA-256 3228c071dd79959a…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 04:47:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0c3ecb51fb5bd82dffe36b1d54fbc4f8 SHA-1: 0651c9dbad443a10617603db7d0a1fc7a3edb7d1 SHA-256: 3228c071dd79959a4c8d8f0392a52d82e15fa6fa34b70c6c0ad00a56946ba644
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Hack App'. The presence of a visual download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting these sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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/coin-master-hack-app-game-hack In PDF document text
    • http://library.atim.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hack-de-roblox-traspasar-paredes_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
stream_004_off00004be5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BE5 24396 bytes
SHA-256: e451f5753d09f689e6fa9cc46b29bbfa853fccd05eec4d58c1e4a3848179a169
font_01_sfnt_off00008284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8284 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off00008c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C22 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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