Malicious PDF — malware analysis report

Static analysis result for SHA-256 e866a5097191dbfb…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 14:46:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ce9b2ebd831d808af1c67204e2862d26 SHA-1: ac9bf4b33b9471b7539f05cad7a56c905747594f SHA-256: e866a5097191dbfbf9d0622e21b6a48a1924a91a2e4b7b7429d6ab3ce70e14df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/minecraft-rtx-download-free-game-hack. This lure is designed to trick users into downloading potentially unwanted or malicious software. The ML classifier also strongly indicated maliciousness.

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/479516143/minecraft-rtx-download-free-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-hack-free-admin_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-hack-all-game-gun_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/pubg-uc-dealer_GM1330123889.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-game-passes-vehicle-simulator-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-fast-on-computer_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/pokemon-go-free-7-day-streak_GM1094591345.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-trader_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_off000031a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A1 22488 bytes
SHA-256: 8dff6dd2483954ad2d8d0a2d73f834f75b0b9d04391d10cc066e21d0a539e0be
font_01_sfnt_off0000639e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639E 18788 bytes
SHA-256: 59fef1939a83a88b836790a1657827780524fe0f1793ff3d02d856994720603e