Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab4c07b513a5c07…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 23:46:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d3298a091594f4976c6da2c82dc53bb6 SHA-1: 4fac36e35974f1f1d677e6947bd911f2151ee531 SHA-256: eab4c07b513a5c077b0aec19e20a2f861ff48b11494d716b165547f45a0acfbd
142 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free generators to entice users into clicking malicious links. The document contains numerous links to external websites, many of which appear to be part of a link farm designed to improve search engine rankings for terms related to game cheats and downloads. The primary malicious URL identified is http://netcdn.tw/app/479516143/how-to-download-wurst-game-hack, which likely serves as a gateway to further malicious content.

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/479516143/how-to-download-wurst-game-hack PDF link annotation
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/robux-800-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/seven-v2-roblox-free-download-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/how-to-get-admin-commands-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalahsan.com/__statics/gudangsoal/files/fly-gamepass-for-free-on-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
font_00_sfnt_off00003541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3541 22020 bytes
SHA-256: ec0e7ea80d40a971cf931754b72295fffb12b52fba71ca184c30469f89dc053f
font_01_sfnt_off00006579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 18796 bytes
SHA-256: 974dfa452ea15aa64f7e9e90f11c9f5a0f04a0e92250d8953572ff33ab2f5b0d

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