Malicious PDF — malware analysis report

Static analysis result for SHA-256 824111eb502c8965…

MALICIOUS

PDF

33.2 KB Created: 2021-06-27 19:40:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d7f80b6e5cefc3af5c3b9f75fc51b0a8 SHA-1: c56157b6f679e03a4a5e66d5d644e9bc574ffce5 SHA-256: 824111eb502c8965270e792a25415d7ddda30826030d96cedb19b1672d362699
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one identified as a malicious redirector pointing to 'roblox-free-stuff-glitch-game-hack'. This lure, combined with the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_GAME_HACK_REDIRECT_LURE' heuristics, indicates a phishing or scam attempt. The document body and numerous URLs reinforce the theme of exploiting popular games for in-game currency or items, a common lure 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 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-free-stuff-glitch-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-game_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/steal-anyones-robux-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/cheat-roblox-oof_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-free-slime-wings_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-and-receive-your-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-skins-xbox-one_GM479516143.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_off00002d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1F 21548 bytes
SHA-256: 25c3973d4f33221d0bc80d89e9e1432a2c0efb0db51d973c5d9ea0bcf25be838
font_01_sfnt_off00005c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C74 19180 bytes
SHA-256: f69f29c5f06135cf9af1d70928a11c5d9b21ab61aae5b96370c8b0ce64a92be1

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