Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6814fd1988685c…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 06:30:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 18d9d31aecf462e15da7f7a7be7cf288 SHA-1: 8b85b26d612095c7db58889a6ec0e331138c12e7 SHA-256: cb6814fd1988685cf4f65d0f04ef0c7d4f3a9ba3aad1cebae2110305df62b83f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free in-game currency to trick users into clicking malicious links. The primary link, http://netcdn.co/app/431946152/roblox-hack-lumber-tycoon-2script-inserter-game-hack, is identified as a malicious redirector. The document's content and embedded URLs strongly suggest a phishing or scam campaign aimed at users seeking cheats for popular games.

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-lumber-tycoon-2script-inserter-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-pc-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hacks-for-bitcoin-miner-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/spam-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-weight-lifting-simulater-hacks_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/commands-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-t-shirt-design-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-cheat-jailbreak-fast-run_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-instantly_GM431946152.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_off00002ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE2 21632 bytes
SHA-256: 649a5f8cbe6d76c28f8f943484db8d8123911e2028aeee13becdce47f15a2f5a
font_01_sfnt_off00005e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E30 19760 bytes
SHA-256: 3cc33319cc38a9cdfd953cf6e1cad50009d016473add816ac3b5190dd5947681

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