Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eaaf99a4aaf6da0…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 01:45:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 70be6e7fe1f22d0c3fa984ab14e826f9 SHA-1: fd20df2781a36e544815357b0a0b5356b446a394 SHA-256: 4eaaf99a4aaf6da0da86954a7abc859775539d84a4d993716f0384a70e9d9f15
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them, with many pointing to game-related hacks and free currency generators. The primary link directs to a known malicious redirector infrastructure. The document's structure and content suggest it is part of a phishing or scam campaign, likely intended to lead users to sites that may host further malware or attempt to steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-support-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/free-robux-every-ten-seconds_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/t-shirt-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/i-got-hacked-on-roblox-what-should-i-do_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-robux-into-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/the-best-free-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/every-free-item-in-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-cr-r-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/tiktok-free-code_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-fly-hack-november-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-promo-codes-roblox-june-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-sharkbite-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-app-by-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/1-million-robux-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-pour-obtenir-robux-gratuitement_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-lumber-tycoon-2-money_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_off00003438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3438 23116 bytes
SHA-256: 9bed3c48161ce35075b542bb57f9385ca42cf820cd69d702080aa60caa133428
font_01_sfnt_off00006820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6820 18152 bytes
SHA-256: 8a7ca81e6782867671c5d30d69d8887df81aa78f66bc52c9d916217fc2f60911

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