Malicious PDF — malware analysis report

Static analysis result for SHA-256 805689def4bcacfb…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 19:10:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2cf63a66b353e9a662c2feabc2251034 SHA-1: 367da6fb8f26481e72fea18275d8a88e86813387 SHA-256: 805689def4bcacfb24850da02bd813957f6857a4c718e39cfe366ff0e18e6d71
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary lure pointing to a 'claim-coin-master-free-spins-game-hack' page. This suggests the document is designed to trick users into visiting a potentially malicious site, likely for credential harvesting or to download further malware. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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 https://netcdn.xyz/app/406889139/claim-coin-master-free-spins-game-hack PDF link annotation
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/roblox-font-free_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3jkt.com/__statics/gudangsoal/files/new-free-money-links-coin-master_GM406889139.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_003_off00004b99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B99 24544 bytes
SHA-256: 978289dba14ae9f16f12bc8317a1d5c7ff4816142aca46351534865b2e57dc07
font_01_sfnt_off0000836e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 18220 bytes
SHA-256: 51400cf6f83d27ff8541fca55c054d9c932d538c26085d145cd133625b41aeb8

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