Malicious PDF — malware analysis report

Static analysis result for SHA-256 41571cb305915704…

MALICIOUS

PDF

36.2 KB Created: 2021-06-28 07:02:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a52fafc9dd33b51db100455474288853 SHA-1: 4534a18f1d4bebe495fb7e40a148f8ea8263dc0f SHA-256: 41571cb30591570407d2c6bd522bc30f0c6ff80c82dd701b3cfb0299f8dc19df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as game hacks and generators, specifically targeting 'Robux' and 'Minecraft'. The primary link directs to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a common lure for phishing or malware distribution, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/how-to-get-a-lot-of-robux-for-free-2021-game-hack In PDF document text
    • http://anna-art.in.ua/images/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-on-roblox_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/my-roblox-account-got-hacked-ant_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-get-free-robux-using-free-codes_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/cheats-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/roblox-catalog-hack_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-robux-today-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000034cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34CF 22704 bytes
SHA-256: efc1c0757a08a0c9957b45e34680c6a346a707555692e857f7ce8455f975f784
font_01_sfnt_off00006766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6766 19384 bytes
SHA-256: 6323be0c93aa6c6bca374bc3174d2f0f5b846e323855214aeea9b3e7bb6c8fd8