Malicious PDF — malware analysis report

Static analysis result for SHA-256 7472f3e678bf0a9f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-08 10:21:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d4d779a87fc2994cff308ddc1b61dc71 SHA-1: e2ccc9bd903f7bca79f8dc59d4ebafdc6d763dc0 SHA-256: 7472f3e678bf0a9f00d119a2e28ff1f44713ea29da8c2eaee3dfc5a398fc4d19
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free game spins and hacks to trick users into clicking malicious links. The document contains embedded URLs pointing to a redirector and directly to other malicious PDF files hosted on an IP address. These links are designed to lead the user to further malicious content, likely for credential harvesting or malware delivery.

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/406889139/how-to-get-100-free-spins-on-coin-master-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-daily-bonus-hack_GM406889139.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/free-robux-phone-number-verification_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-hack-generator-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-no-download-no-survey-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-hack-999999-robux-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/is-it-ilegal-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-bux-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-elemental-battlegrounds-diamond-hack_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robux-generator-hack-2021-no-survey_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
stream_002_off000031a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A8 23304 bytes
SHA-256: 50a60c2dbcf8c55d58de3b4ceae8611f4fa446ea615203ae8ca1b56c5abcc40c
font_01_sfnt_off00006679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6679 18616 bytes
SHA-256: 75e6ca0d846814030aeb8d238a6779e7a1e1c8622c374b69a8320c66161e23d2

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