Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec7bc080b7a719b…

MALICIOUS

PDF

33.7 KB Created: 2021-06-27 17:34:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: edea7fe27e684add39ef452040489b94 SHA-1: ea97707d45efc2044a8e419385e2ac0fa004ea0c SHA-256: 4ec7bc080b7a719b3c1dab238c783e8ecf10cc94f8fc81e29b1e58c7c23c9743
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to trick users into clicking malicious links. The embedded URLs, such as http://netcdn.co/app/431946152/how-do-u-undo-someone-hacking-ur-roblox-acc-game-hack, are known to lead to malicious redirectors. The document's content and heuristic firings strongly indicate a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-do-u-undo-someone-hacking-ur-roblox-acc-game-hack In PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/minecraft-items_GM479516143.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-hack-roblox-wanted_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-make-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/roblox-obc-lifetime-free_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-roblox-exploit-dll-namedpipe_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/http-get-free-robux-eu5-net_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-robux-obby-download_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/weird-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD2 22376 bytes
SHA-256: 014fe6faadbbd429d174f90c7ea231229c1b3325e61e007675d6485fc047b047
font_01_sfnt_off00005d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D71 19540 bytes
SHA-256: 0ec14d66bd3fede54fec8b5f0937c02eb0b66bf2b0aacf930a888cd258821000

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