Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a9d370ee2ad00a…

MALICIOUS

PDF

33.8 KB Created: 2021-06-18 02:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b9fd2fc70fe3fc559e8932897101c95d SHA-1: 99ed652d56b4a64140cf62288bfa61fda9d219a3 SHA-256: a5a9d370ee2ad00a3aa8f4700ee5d060afa4c72a350859e96e74ef69c4f42a8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items and hacks. The primary URL, http://netcdn.co/app/431946152/free-roblox-card-pins-2021-game-hack, is identified as a malicious redirector. The document's content and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for financial gain or further 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.co/app/431946152/free-roblox-card-pins-2021-game-hack In PDF document text
    • http://zercalo.org/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-script-hack-gui_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/redeem-robux-codes-free_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-card-giver-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-new-monstersimulator-hack-script_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-fast-no-waiting_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-hack_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_off00002e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E01 21740 bytes
SHA-256: 943e3b7fdef75bacf49092498cde3a000eb38ed1f34d6da61e30db8a1e924f04
font_01_sfnt_off00005e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0C 19312 bytes
SHA-256: afe004804fcf586b3b7344b2969df39656a02460d0ebf3e86e279bbc0ce70387