Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4220bbfa62dcdb7…

MALICIOUS

PDF

33.4 KB Created: 2021-07-07 12:14:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 36670a9f46e3634d54616e2ff5ba94b0 SHA-1: da040af885d2b681b150bac41dec906c13e13b91 SHA-256: b4220bbfa62dcdb78a72ca19f0e1e426f1bc53f20942520ea021a84fa02b7bb7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further PDF files containing similar lures. The ML classifier strongly indicated maliciousness, and the document body confirms the deceptive content.

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/greenlegocats123-how-to-get-free-robux-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/descargar-roblox-hack-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-operation-scorpion-hack-dwonload_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/cheat-engine-roblox-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-teleport-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/como-hackear-roblox-admin_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/como-hackear-assassin-en-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-us_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-faces-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-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
font_00_sfnt_off00002e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E07 21296 bytes
SHA-256: 32e322113522f2c6b3b620a8a94b23439b3fb469dfe8d5971f44fe0acc94b8e5
font_01_sfnt_off00005c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C73 19276 bytes
SHA-256: 1e749eee2240748c6d63dd27ef41c01b89781f05cc32c5e210dfb6db488125ba

Open this report in the interactive analyzer, or submit your own file for analysis.