Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e733d01cbe990f…

MALICIOUS

PDF

42.9 KB Created: 2021-05-19 18:15:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e6a3e49cd7f6511127425738eb05c33e SHA-1: 754de982a87c1120c6ecf70031f821d496728fcd SHA-256: 76e733d01cbe990fe318e37d6e138fc8c7e5b8f0fb668d0bfc80f352ba5d079d
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector infrastructure, masquerading as a 'free generator / game hack' lure. It also displays a fake CAPTCHA to trick users into interacting with the malicious content. The embedded URLs likely lead to further malicious content or exploit delivery, suggesting a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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
  • 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-get-free-premium-roblox-game-hack In PDF document text
    • http://apx-centre.ru/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-verification_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/google-moon-active_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/robux-earner_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-no-verification-or-survey-2021_GM431946152.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_003_off00004807.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4807 25668 bytes
SHA-256: 3015861d06d7fec53cecc32bf53581f3c443f9a26989ea97f9e871ee54223bc9
font_01_sfnt_off000083ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AC 18888 bytes
SHA-256: b5a20fef57cf108902425c7fe9107080aaf47056a074752b6f70fc2176bbaa7e

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