Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc60443ee07901e2…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 17:16:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 17b1b4874e5e10af42f93a255173d74b SHA-1: 5740918991fe86d3c8a4448a74d764744920df23 SHA-256: cc60443ee07901e2a63cd80d5297c1ab5011580153bafebf3b1741dfcd3f5336
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple embedded URLs, including a primary malicious redirector at http://netcdn.tw/app/406889139/daily-coin-master-free-spins-game-hack, which is designed to lead users to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of numerous links to other potentially malicious PDF files reinforces this assessment.

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/406889139/daily-coin-master-free-spins-game-hack In PDF document text
    • http://www.ocic.hr/files/free-robux-2021-actually-working_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/get-roebucks-com_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-any-roblox-item-free_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/bleach-primera-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-how-to-get-free-unlimited-robux-hack-glitch_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/free-girl-pants-roblox_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/howe-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/get-free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/there-are-secret-ways-of-getting-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/robux-gift-card-codes-for-free_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-hack-version-download_GM406889139.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_off00002e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E23 22232 bytes
SHA-256: 46992c4f9bac0b6bf5619442539188943ef8897c03c1c4c51bdcc491b166306e
font_01_sfnt_off00005faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAA 18596 bytes
SHA-256: f67cf45397c25494501e3e9871b79c38ca25439d2209cefdb99d193c8fd940d5

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