Malicious PDF — malware analysis report

Static analysis result for SHA-256 52846b2add7a8047…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 07:16:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b460b192c7a921b3f5c8322774f5f809 SHA-1: fc120330f4092f0c5c85771e0874195c7fbbdbcc SHA-256: 52846b2add7a8047ebfce8d93b6562f65d4461e61055ba3ab5c5c245695d53d8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as game hacks and generators. The heuristic firings indicate these links are known malicious redirectors and are part of a lure for free game items. The document body, though partially corrupted, contains similar URLs and text related to game hacks, reinforcing the lure. No scripts were extracted, but the primary attack pattern involves directing users to malicious sites via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/coin-master-free-coins-amp-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-scrit-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-free-hoverboard_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/health-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/eternial-moon-skylight-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-cool-and-free-hat-catalogue_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/escape-room-roblox-cheats-enchanted-forest-secret-password_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hackcom-robloxcom-ilum_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_off00003168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3168 23104 bytes
SHA-256: 554dd91512569c45b4e3fb260ea27fd89af5f079fd8215f91f405a3991934eea
font_01_sfnt_off0000658b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 18432 bytes
SHA-256: 115052c54ad7be7ecf7f7200d638d52990c020622732c51f9e53714cbdbedbdf

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