Malicious PDF — malware analysis report

Static analysis result for SHA-256 d880ff51fc928576…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 07:06:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8c6acf9873ae06fa3f14959358c0be99 SHA-1: b60b0de65123ce8d032637741f1ff4bbb479a2e5 SHA-256: d880ff51fc9285767ffb632968dcbd2c016681532ec2e834777c750b9d9eb411
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, all related to 'free Robux' or game hacks, indicating a lure for users to download potentially malicious content or visit a phishing site. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URIs further supports this assessment. No scripts were extracted, but the document's structure and content suggest it is designed to trick users into clicking malicious links.

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.co/app/431946152/funbloxxyz-free-robux-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/roblox-jailbreak-hack-2021-noclip_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-font-download-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/my-roblox-account-has-beem-hacked_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-2021-mac_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-robux-easy-and-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-download-roblox-hack-tampermonkey_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-argent-sur-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-retail-tycoon-cheat-engine-how-to-get-money_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/best-games-in-roblox-to-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-builders-club-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/codes-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-roblox-accounts-on-ipad-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-apocalypse-rising-2-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-cheat-robux-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/redeem-code-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000030da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DA 21692 bytes
SHA-256: 1db7856e0f90fd588f51254bea51b22f2a6b2031543f28db08ebbb266760e8cb
font_01_sfnt_off00006078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6078 19052 bytes
SHA-256: b8da4c12b443ea16a452d57305b0b851670a4d0bed79603d1953fd1acd138761

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