Malicious PDF — malware analysis report

Static analysis result for SHA-256 023ee04b9ac83982…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 03:04:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 59701ccc881a942213dc2ac2d7cdd38d SHA-1: 3490fce39491cfd3ef819330aac3c3b2b3439937 SHA-256: 023ee04b9ac839824cb8c8fdf34f2134cde8e511221149af1dc17ef2dbff13ef
200 Risk Score

Malware Insights

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

This PDF document employs a common social engineering tactic by presenting a fake CAPTCHA or human verification prompt to trick users into clicking malicious links. The document's content and embedded links, such as 'how-to-get-free-cloth-roblox-2021-game-hack', strongly suggest a lure for game-related cheats or hacks. The presence of multiple redirector links indicates a clear intent to lead the user to potentially harmful websites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-free-cloth-roblox-2021-game-hack In PDF document text
    • http://moneymaker-gold.de/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/roblox-earn_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/roblox-scam_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-robux-images_GM431946152.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://moneymaker-gold.de/files/free-spin-links-coin-master-2021_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_004_off0000518d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518D 26152 bytes
SHA-256: 81d5c9c9d2198ab7d88646d14a802f76793c33524a7353d6a2d8a88ac34e3b65
font_01_sfnt_off00008eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAF 18784 bytes
SHA-256: 06c39aa32b4c0d1ab9789ce3d7230384ce78e27b21253f8f60b37a5000e94f25

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