Malicious PDF — malware analysis report

Static analysis result for SHA-256 e291538ed9fc41b1…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 12:01:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c5169c2533827f72d07a96e07d16f3b3 SHA-1: 0edc35f4a768cc456e6d7bf7a6678e0e561163b6 SHA-256: e291538ed9fc41b168c29183317609214ce7fe8fbc08d2e34a07f573263b63d2
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 trick users into clicking malicious links. The embedded URLs, such as http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-2021-game-hack, are flagged as malicious redirectors. The document's structure and content strongly suggest it is designed to lead users to potentially harmful websites, likely for further malware delivery or phishing.

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-spins-and-coins-2021-game-hack In PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/easy-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-hack-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/cheats-on-roblox-game_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-unlimited-spin-and-coin-hack_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
font_00_sfnt_off000030a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A0 22192 bytes
SHA-256: 560025594e2875504424e3798395a899815ae758492552aa75ca1e9ecfef2a97
font_01_sfnt_off000061d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D2 18752 bytes
SHA-256: e4aa4bc966ade2ebd198d7ae698a70c714723bf3d78331a5c03b975dc9a7ea7a

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