Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e1d08c826141cf…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 21:43:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ce17bca2e06161718cea57b8a1f082bb SHA-1: b19e1ed8b06cfccf96e645df34f5ad05bd80ef4b SHA-256: d8e1d08c826141cf264e2115cdb6c1757cf2af9047342a613d744e81112ab432
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/free-stuff-that-you-can-get-in-roblox-game-hack. The document body and embedded links are designed to lure users into clicking these links by promising free items and hacks for popular games. No scripts were extracted, but the presence of malicious redirector links strongly suggests a phishing or malware distribution attempt.

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/free-stuff-that-you-can-get-in-roblox-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-anti-cheat-speed_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-free-admin-dll_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-have-free-robux-with-site_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-items-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-cheat-on-your-roblox-girlfriend_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-redeem-codes-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/cheat-engine-roblox-this-game-has-shut-down_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/robux-claimer_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-for-android-apk_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-unlimited-spin-apk-free-download_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_off0000313f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313F 22724 bytes
SHA-256: 4a61e88b8aa4125caae084f5e1700f85bb21c791d69658ef9285444b9ebb3d97
font_01_sfnt_off00006416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6416 19224 bytes
SHA-256: c881d6bafa891cf232894209e2e73676f49341cfc10051f7a70c1af08985c23a