Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a690f96862f2fb…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 09:50:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 373ee1d833076bdef1fbb10c1bfc1754 SHA-1: 14d1f517918f0be923a1a55d39f9214e9d124b5e SHA-256: 98a690f96862f2fb3315069f675ee576c9f9d4d72f551eb63482b499e1e6a0cb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with 'game hack' content. The primary malicious URL identified is http://netcdn.tw/app/431946152/how-to-hack-someone-on-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation 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.tw/app/431946152/how-to-hack-someone-on-roblox-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-aimbot-hack-for-nerf-fps_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-dbz-super-saiyan-war-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/can-you-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-hack-greasy-fork_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/seven-v2-roblox-free-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/space-frontier-beta-release-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-hack-uk_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/regal-world-coin-master_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_off000030ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FF 22888 bytes
SHA-256: b86232fd5f137eb67204f3f72254ed865e07e766bc270e3388f813b3c5b1da4d
font_01_sfnt_off0000641f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641F 19080 bytes
SHA-256: 963276ac3658a4f1303280410bd3aafd1a833c38ea79ed0af769875644ea58f7