Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7fbb5edb359377…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 13:35:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 50622921336c6542b0f880c73d4ce4e6 SHA-1: 0e302929602327f4f2560f03cb8566374d1d2530 SHA-256: 6f7fbb5edb3593771c46064cef07c060fc4d83d6b62ba40d5e51f1ea21e33667
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game currency and hacks to trick users into visiting malicious websites. The document contains multiple embedded URLs, including one pointing to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-robux-no-verification-or-survey-2021-game-hack. Additionally, several links point to an IP address, suggesting a coordinated effort to host potentially malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-no-verification-or-survey-2021-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-stuff-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/royalty-free-music-one-sirius-beats-roblox-id_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robux-adder_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-how-to-get-any-gamepass-free-not-patched_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_off00002f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F86 22532 bytes
SHA-256: 2c5561a03df17a41b4f4dd767e00333ebfd56f2f398008bfd7af814e39f0a393
font_01_sfnt_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 19772 bytes
SHA-256: a441bd845f25f30d9b35deb0a49928c69a030f2d5bccbb8c502819d18c42e29e

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