Malicious PDF — malware analysis report

Static analysis result for SHA-256 519aab051fc1ad63…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 04:44:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 78403d9f80ebcad577a3dea3b25199cc SHA-1: a372ec5653910fbad9a01d27a37f841f64616a27 SHA-256: 519aab051fc1ad632ce13c43ae32320941985e6615becd07f912cd21d40347a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a 'free generator / game hack'. The document body explicitly mentions 'Donate Robux On Roblox For Free' and includes the malicious URL, indicating a phishing or scam attempt. The presence of multiple links to similar lure content suggests a campaign focused on tricking users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/donate-robux-on-roblox-for-free-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/tiktok-free-unlimited-likes_GM835599320.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hacks-for-the-legendary-sword-rpg-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/medieval-hood-of-mystery-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/5-free-robux-games_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-black-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/etok3-crab-roghoul-alpha-roblox-cheat-code_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-project-pokemon-how-to-get-mewtwo-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-booga-booga-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-create-a-shirt-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_off000030e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E2 22792 bytes
SHA-256: f2210d1689f27a489b3975e2896dd0060573dfe10940ed21eafe8b489fbe93f3
font_01_sfnt_off000063c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C0 19060 bytes
SHA-256: f6fbc8af93804628484d17edefe874fcc5b87e584f3de194d053181c501d8344