Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83de591a989da0f…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 10:23:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bf6887039cd18688f0f5ce6df1b6583e SHA-1: cf2f5289e29ae8fbab8ec0cfee398d14923e5df5 SHA-256: f83de591a989da0f9783fe232ed48adfda23d3fa9cbbb43fc0a4d1740961b0e7
122 Risk Score

Malware Insights

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

This PDF document employs a common lure of "free game hacks" to trick users into clicking malicious links. The presence of a fake CAPTCHA or human verification prompt is a strong indicator of malicious intent, designed to coerce users into proceeding. The document links to several external URLs, including one identified as a "free generator / game hack" redirector, which likely serve as the initial stage for delivering a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-windows-10-free-game-hack PDF link annotation
    • http://abdinusababellibrary.ac.id//repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-codes-no-verification-2021_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_off00005288.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5288 25476 bytes
SHA-256: c43e1338dc0e62a68a6c45c633f7b8be50649bee2e09a21b32b0774fcb338e03
font_01_sfnt_off00008cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF5 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000096e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E0 18524 bytes
SHA-256: 61f4e129dbb086a6f9797ef369c55cdd3b58d633037fca8f4f59eaf5785788a4

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