Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f4fe6c710a1be0…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 02:49:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f10844fa27cfda959060959ce39ba19e SHA-1: c35a6bb12cef4731ac688e34728604cbc0c005e4 SHA-256: 14f4fe6c710a1be02ff35b0dc943a8d3ddb04402ebd98c18c0de9b9269a808eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites offering game hacks and free currency, indicating a phishing or malware distribution attempt. The document body explicitly mentions 'how to install a hacked client Roblox' and includes the primary malicious URL, reinforcing the lure. No scripts were extracted, but the embedded URLs are sufficient to classify this as a malicious lure.

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/how-to-install-a-hacked-client-roblox-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-royale-high-school-hacks-de-todo_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/nezi-plays-roblox-building-hacks_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-promo-codes-roblox-wiki_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-dead-winter-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-minecraft-windows-10-edition-for-free_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_off0000349b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x349B 21984 bytes
SHA-256: 7733f52a6abf63424917f5ebb432107d074ba42fdc4ac3b65c6e485abe1749fa
font_01_sfnt_off00006527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6527 19220 bytes
SHA-256: 8b6638a1d16aa49f0ccbf85736da43c9471f7bbd8b26764bff523e40e4128e43

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