Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4efba00e1007ac…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 13:04:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 03e0e24dd00d10c012ea5acbc1360a24 SHA-1: 26449be62ec024b9342a08493ddc228d07efbb97 SHA-256: cc4efba00e1007ace480283d4ff93541804ecaa655586cc9b2b79df533a05c03
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links, including one identified as a 'free generator / game hack' lure, directing users to potentially malicious websites. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs suggest a social engineering tactic to trick users into visiting sites related to game cheats and currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/freespinandcoinblogspot-com-2021-11-coinmasterfreespins-game-hack PDF link annotation
    • http://elib.upiyptk.ac.id/opac/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/do-you-want-free-robux-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/robux-claimer_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/without-human-verification-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-win_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/addrbx-earn-free-robux-by-doing-tasks_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/earn-free-robux-plus_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/i-got-free-robux-from-this_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B3 22984 bytes
SHA-256: 675f69c2afaa3ef48ef97a5e99f93fd55ddb17dbebf772f966c3c6471fbd6833
font_01_sfnt_off00006668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 19240 bytes
SHA-256: 4d79388b77b70e51239d224782561472d5aaa6f564ac5e1b9a8e71f2b8352f5e

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