Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad672dba80e1950…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 16:54:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 51bf050cba163b82a364c10b0cbe331b SHA-1: f6177057eb0b91531227a892fd278600a193429d SHA-256: 1ad672dba80e19507617b0754b5106c60b3b69f3bf53ce577a8645c9f295dfdb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free spins' and 'game hacks', directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics indicate a social engineering tactic to redirect users to a potentially harmful site for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/25-free-spins-coin-master-game-hack PDF link annotation
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/descargar-hacks-para-roblox-gratis_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/how-to-make-your-own-game-whith-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/bhop-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/cheats-for-roblox-kohls-admin-house_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/hack-pin-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/roblox-hacked-pour-avoir-des-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/timber-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/2021-roblox-place-free-bricks-image_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/free-roblox-accounts-that-work-with-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/cmo-conseguir-free-robux-generator-2021-100_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/how-do-you-hack-roblox-accounts-with-a-file_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/cheat-engine-lua-script-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/free-coins-coin-master-hack_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
font_00_sfnt_off00003415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3415 22828 bytes
SHA-256: 44109380866e0e550f350b4dd211e92d54d36d167440c65ce83e799b16fc716b
font_01_sfnt_off000066ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66ED 18432 bytes
SHA-256: ec79058dc3660cd38899abd0af6a529c62159de1466b2a8febb865623eb50a1d

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