Malicious PDF — malware analysis report

Static analysis result for SHA-256 c491a1e35b8cdadd…

MALICIOUS

PDF

30.8 KB Created: 2021-07-19 15:20:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3c2f64d610fc9cd636fd806d44c61602 SHA-1: 3169225c367eab370d14812491c1a9cb3b22649a SHA-256: c491a1e35b8cdadd115695ddc6b35b5aed951ac710222a45d1c5880fe7c06ed7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links and a call-to-action phrase designed to trick users into downloading or accessing resources related to game hacks and virtual currency. The primary link, http://netcdn.tw/app/431946152/free-robux-exe-game-hack, is identified as a malicious redirector. The document's content and embedded URLs strongly suggest a phishing or scam attempt, likely serving as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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/431946152/free-robux-exe-game-hack In PDF document text
    • https://7gking.tw/upload/files/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-can-you-get-free-robux_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_off000025dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25DC 22064 bytes
SHA-256: 89ebcb05aa40c1671f513cacc53130f47217cb1c2bcf790af59da124ac92bafb
font_01_sfnt_off00005689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5689 18200 bytes
SHA-256: 67527198e8f3e954f788e220fdc5e0efc04c24ca5928f64c044788dd6707c9fd