Malicious PDF — malware analysis report

Static analysis result for SHA-256 361ccd6e51aa41b6…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 13:02:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5d9e821a5438a131f5e6856c62493ed4 SHA-1: 1d697bcf02660587ee7ec2786ff2f07046a82b96 SHA-256: 361ccd6e51aa41b66f9a50db6fd68bfdae6d4ba68ee0fa5fae5f8b2674b67ff0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, with a primary link identified as a malicious redirector. The document body and heuristics indicate a lure for game-related cheats or generators, suggesting the intent is to trick users into visiting these sites, likely to download further malware or engage in phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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/coin-master-free-spin-no-offers-game-hack In PDF document text
    • http://www.hlad.hr/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-use-the-cheat-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-cheat-engine-shut-down-server_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-robux-free-easy_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-gift-card-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/toolbox-apk_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/inspect-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-20-free-spins-link-today_GM406889139.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_off00002f42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F42 21804 bytes
SHA-256: b698fa69b90c15a73912eb6490c379c8a1e7ee63cc44b6ee6e7f3df49592ca15
font_01_sfnt_off00005f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5F 18176 bytes
SHA-256: 374def243e09b78f978b163973b6414630279687ee7da3e136f049d0a4a9b1d1

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