Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d407b7490a034e0…

MALICIOUS

PDF

32.9 KB Created: 2021-07-21 03:08:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a25cd300fdc5dcb30b16244426cc9989 SHA-1: 5a8fe7431067359971c6b84ca076573605d1e2d6 SHA-256: 4d407b7490a034e09adec6d0ce379cb8301dbff31e63d05cf0c2a2ab3f0d60e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "Roblox Robux Hack" or "Minecraft Hacks". The primary lure appears to be a free generator for game currency, which is a common social engineering tactic. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/431946152/roblox-robux-hack-game-hack In PDF document text
    • http://magistrinfo.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-robux-website_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-robux-link_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/robux-free-c_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-tiktok-coins_GM835599320.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_off00002a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A24 23100 bytes
SHA-256: 451e8e5adeaf96dbba635d4132ad169f73a2b7dad71ef848fac8f62db3f074d2
font_01_sfnt_off00005ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDD 18508 bytes
SHA-256: 4668884a5238ce392f70cf6270cdd41fb4d04f02843369cb50cdd53041a5b0b7

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