Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c30dea4bea3b38…

MALICIOUS

PDF

33.4 KB Created: 2021-07-19 06:48:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4f466ad3604f93e427fce4978827cdc3 SHA-1: c8880766d71bb48ee6b1a2e7f19642196ef7ffa3 SHA-256: 04c30dea4bea3b385f5dca36808b535b1bab6a7271e781d2bbab20e21314d007
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as generators for popular games and services. The heuristic firings indicate that these links are designed to lure users into clicking them, likely leading to further malicious content or downloads. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/835599320/free-tiktok-accounts-game-hack In PDF document text
    • http://teknotools.net/images/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://teknotools.net/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://teknotools.net/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://teknotools.net/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://teknotools.net/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://teknotools.net/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://teknotools.net/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://teknotools.net/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://teknotools.net/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://teknotools.net/images/free-tiktok-followers-generator_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_off00002f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7A 22740 bytes
SHA-256: 88a04161bb26153694226393cc385b51ec54eb6195aca2cdf8532e329c671ff9
font_01_sfnt_off0000628e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 17596 bytes
SHA-256: 78bf98ee26562f259e5df0f7ea395c63cf95895c72ff2901d5340c85fa588773