Malicious PDF — malware analysis report

Static analysis result for SHA-256 a086c583f7a5120c…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 23:11:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e42ee9e1a007dcaaa67b99af0421d39d SHA-1: 4ee177909673d18ea590ebb946ba3bd1d7dc95b9 SHA-256: a086c583f7a5120cbb3785af2d29ed05ea7671442b4c60f2c75a49bec8a2bc9b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically targeting users interested in game hacks and generators. The document body and heuristics indicate a lure for free in-game items or currency, which is a common social engineering tactic. The primary URL identified, http://netcdn.co/app/431946152/how-to-get-free-clothe-roblox-game-hack, is flagged as a malicious redirector.

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-get-free-clothe-roblox-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/free-girl-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-atamations_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robeats-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-money-apk_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-arcane-adventures-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-rocitizen-money-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-de-robux-abril-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-avatar-codes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-on-laptop-easy_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-draw-on-roblox-free-draw_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_off00003127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3127 22312 bytes
SHA-256: 0b16f0d0ce764a6cc9ffdd423f327bb7ff8975f99a81f76e714d1b72bfe52e09
font_01_sfnt_off000062b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B7 19084 bytes
SHA-256: 19226ae84bc2d95dab0236afd2ab906cc884c4f6a116e151323f8426ca41f113

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