Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c437d5f17f4d5c…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 14:42:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9ada2d23487c6f0344d75f24be4171c7 SHA-1: f1426722d506ed6ef8456291a5b961f10f401089 SHA-256: d6c437d5f17f4d5c90dfc47ae0f0197a5e273341fe5bb55a6b518d96874785a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links designed to lure users into downloading or accessing potentially malicious content, masquerading as game hacks or generators. The primary link, http://netcdn.co/app/431946152/roblox-hack-pets-simulator-game-hack, is identified as a malicious redirector. The document's structure and embedded URLs strongly suggest an attempt to exploit user interest in free in-game items or cheats to redirect them to 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/roblox-hack-pets-simulator-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-create-your-own-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/como-hackear-cuentas-de-roblox-xonnek_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-roblox-today_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A1 22596 bytes
SHA-256: 4370a602548ec0ac31d6b2df84cc22aa07eae348147e8dd510d206c71de3dbc1
font_01_sfnt_off000063fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FC 19432 bytes
SHA-256: ef877a371e5fe8ce9641207ba8431b63e0d3c032681ba8ac94f660d8063f9f99

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