Malicious PDF — malware analysis report

Static analysis result for SHA-256 543570a59926b51f…

MALICIOUS

PDF

33.3 KB Created: 2021-06-28 15:09:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 708bc5e276e1b25a560facd578856eba SHA-1: 15b4d024c883b7cdbe409e35573691b7b50524dd SHA-256: 543570a59926b51fee42929f93cd42877dfe55b0caf9d1b5b281608a78f7d11c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The embedded URLs, including http://netcdn.co/app/431946152/free-robux-codes-2021-not-used-october-game-hack, point to known malicious redirectors and infrastructure. The document's content and heuristic firings strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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-robux-codes-2021-not-used-october-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/fashion-frenzy-roblox-free-vip_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/real-free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-can-you-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-phantom-forces-noclip-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-online-hack-connect-your-account_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-roblox-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/before-dawn-hack-roblox-pastbin_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/cheat-power-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-promo-coes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-link-app_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_off00002dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAB 21208 bytes
SHA-256: 4f77c4684e63fb1e25c98178aff9f9ce57902bf72f26c0a6459fe96e651cf748
font_01_sfnt_off00005bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEF 19396 bytes
SHA-256: cb8cf37fcdc2e36d245ce21cac71f5229cd88cc382d6460ea32c27fe371376b4

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