Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8ab48028e80e35…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 18:26:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2f81db2b008a8d9b2d9be65482be8104 SHA-1: b48ad8b1d9bab5e3fcbfb561959af7ea1d4ac2a8 SHA-256: aa8ab48028e80e35950556e7f8f8f56686b321bfb2e408357cb7e481e2a0138f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, masquerading as 'free generators' or 'game hacks'. The primary link, http://netcdn.co/app/431946152/survey-information-sheet-for-free-robux-game-hack, is flagged as a malicious redirector. The document body and embedded URLs suggest a lure for users seeking in-game currency or cheats, which is a common tactic for phishing or malware distribution. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

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/survey-information-sheet-for-free-robux-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-roblox-troll-gui-synapse_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-code-generator-dangerous_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-amera-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/treasure-hunt-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-free-robux-proof-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/descargar-gratis-hacks-para-cualquier-juego-de-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-gold-cards-hack-2021_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_off00003238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3238 22496 bytes
SHA-256: 88a3e197f6570d9ef8ac63724d29b2a706b0ac9c03347a363918827ff190dce1
font_01_sfnt_off000063ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FF 19660 bytes
SHA-256: 609fcf22f9478cd0df6f5516d971ac1952cc4222d65ff4f7341b0e3ab62aca5a

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