Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c0cedba2de197b…

MALICIOUS

PDF

34.9 KB Created: 2021-07-09 11:35:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 77da5e913586152c5772f420458f1b07 SHA-1: 09c83593570e280fd177393ed8bba1ca3af4b089 SHA-256: e9c0cedba2de197b72dd4a9b1fc8820ff55ef29d89a65544bc3c901581c0a18d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as 'free generators' or 'game hacks' for popular games. The document body and extracted URLs strongly suggest a lure to trick users into visiting these sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing or scam campaign.

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/431946152/free-robux-2021-no-human-verification-game-hack In PDF document text
    • http://fourieredu.cz/files/ckfinder/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/tiktok-viewer-free_GM835599320.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_off00003014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3014 22128 bytes
SHA-256: 718eb5d26f35c0a55db00ec2d40ef0ea5ab054f12c42fd3d06a099737d4ed981
font_01_sfnt_off00006124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6124 19736 bytes
SHA-256: 415a8643b263bdb8a5e4ae51f1e0119ae52f9187a77a7c28158d674e6dc65c25