Malicious PDF — malware analysis report

Static analysis result for SHA-256 144f98301394e299…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 17:35:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 325140735390591ea4763885c942de86 SHA-1: 9e788e8b246e7c45ec3373ca56ee0c4ca96f76aa SHA-256: 144f98301394e29910959e46b3aa045f2cdd7ec0da20cfc4e5cc35f710adb56d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure to trick users into clicking a link, which is a common social engineering tactic. The embedded link points to a site promising game hacks, further reinforcing the lure. While no scripts were directly extracted, the PDF structure and heuristics suggest it is designed to exploit user curiosity and potentially lead to further malicious downloads or actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-robux-pastebin-game-hack PDF link annotation
    • http://jkcoaching.nl/images/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://jkcoaching.nl/images/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://jkcoaching.nl/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-free-cards_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
font_00_sfnt_off000047b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47B1 26240 bytes
SHA-256: 68de103df167627cdb1038e5a0762d6d4adaff2b770221d332ea0b5b58a27035
font_01_sfnt_off00008272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8272 18620 bytes
SHA-256: 10493b23bc5ef0d73c1582ce0af85c313c8077c60a374ecda70c4edbf5cadd5c

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