Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c70c4cebd580ac4…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 20:19:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 39fb0eb78f0955e253ec9a9cd5eb1191 SHA-1: 99ac5711b3d5bae1f545e928e71a8fd94b56c975 SHA-256: 6c70c4cebd580ac4c6f7e259fd4d4c5f7fabb3bba4e62e8482f27ec56c013536
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-install-free-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/descargar-hack-para-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-no-app-download-or-survey_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/code-pour-des-roblox-free_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-hack-your-friend-on-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/new-roblox-exploit-wizard-simulator-hack-god-mode-autoattack-1mp4_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-android-app_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-invitation-template-free_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-2021-easy_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/tiktok-free-view-500_GM835599320.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-hack-roblox-money-mac_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/earn-robux-com_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-hacks-to-buy_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-free-online_GM479516143.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_off00002fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD9 22912 bytes
SHA-256: 78aa37b7767a8ea1a127c14bcd0927cb1c5da56db5b053cfe5883b6a9355268a
font_01_sfnt_off00006349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6349 18752 bytes
SHA-256: 1d55b3fd9f6369f8e68c2ca1b9c300169a68fb96c94d2ac67d1ae5c18d40cf4f

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