Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdde950efcd670d0…

MALICIOUS

PDF

43.1 KB Created: 2021-05-19 02:04:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 52d18d6b01732e1b7fc454c5abab7967 SHA-1: da742e03a6707f57a8890995d3d13c9d1ad1b318 SHA-256: fdde950efcd670d04f71d57fbcc87b0e922425c6ba7f4b3d6c129737eef01aaf
122 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks and generators, specifically mentioning Robux and Coin Master. It includes a prominent link to 'netcdn.xyz' which is flagged as a redirector for game hacks. The presence of a fake CAPTCHA heuristic suggests an attempt to trick the user into performing an action that could lead to exploitation or further malicious downloads. No scripts were extracted, but the overall pattern indicates a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9673

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/how-to-make-robux-on-roblox-game-hack PDF link annotation
    • http://soma.com.ua/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/rbxoffers-earn-free-robux_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
font_00_sfnt_off00004531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4531 23672 bytes
SHA-256: 83e4b6b399a23be5a26055d76d787697ac266c85130728d2225889d55a273469
font_01_sfnt_off00007ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC2 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off0000847d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x847D 18680 bytes
SHA-256: 4ee66bb7c80a3238b98a264a09ad062de9bd506d82a8120fadf8a4fb1bc8e733

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