Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bee782147ba40e…

MALICIOUS

PDF

33.8 KB Created: 2021-07-09 00:42:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4dc65445cb2c3a5f4bc09fcc565e3877 SHA-1: e75e0e5d43cecb4e11f13bac2533887f8e9abe72 SHA-256: 80bee782147ba40e76c194db432da411f924a600e8f9cb45ba014347db3ac692
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically advertising 'free Robux generators' and similar game-related cheats. The document body and heuristics confirm the intent is to trick users into visiting these sites, likely as a lure for further malicious activity such as credential harvesting or malware delivery. No scripts were extracted from this sample.

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.tw/app/431946152/free-robux-generator-for-kids-game-hack In PDF document text
    • https://razredna-nastava.net/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/hack-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-cheat-gg_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-online-roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-roblox-for-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-credit-card-to-buy-robux_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
font_00_sfnt_off00002cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDB 22456 bytes
SHA-256: 30062f445f1250ed866f3e46015404a68cce410bb94ce1cbaa8444dd9bff6103
font_01_sfnt_off00005ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 19112 bytes
SHA-256: bfd1a83f6845c5ddf7ed6c77f5c6ea2f08ed895d31f12c1f792f1c6eedabde29

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