Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c60a87053f789b…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 23:13:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f779199d179aa649743c07b9c888bb92 SHA-1: df47744bc683530b36084317803ae49d752320dc SHA-256: 29c60a87053f789b0bccfaf94cb17e7565dcc5250b8ffb6950134d8f652dc990
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, employing tactics like 'free generator / game hack' and 'download button' to entice users. It contains numerous links to a redirector and a link farm of SEO-optimized PDFs, suggesting a multi-stage attack aimed at driving traffic to malicious infrastructure. The primary malicious URL identified is http://netcdn.tw/app/406889139/free-coins-coin-master-blog-game-hack.

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/free-coins-coin-master-blog-game-hack In PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-how-to-get-free-clothes-without-bc_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-in-a-game-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hacking-robux-com_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-roblox-zombie-games_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/robux-theres-no-way-of-getting-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/download-speed-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/robux-gift-card-number-free_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/can-i-change-back-to-old-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/doctor-louie-roblox_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
stream_002_off000033b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B9 23784 bytes
SHA-256: 3df50e42216d04a36339468707a9ab71e280f68ca039f6a0028e844b13629ea4
font_01_sfnt_off000069de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DE 18288 bytes
SHA-256: 4d8a9a5f845e6a4543ff8d893a9e279bb8bc764ff82ea70c3d9fb3020af74c46

Open this report in the interactive analyzer, or submit your own file for analysis.