Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca22c723ced6f7ea…

MALICIOUS

PDF

33.6 KB Created: 2021-06-18 22:15:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: aea0dfc2af5990a8ad670677517eb4ae SHA-1: b04b14c7c10cf5d70382351060766496ce54dd9c SHA-256: ca22c723ced6f7ead3e35737f999920bea985672031b9d93fabcd716ffa61a01
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites that are either known malicious redirectors or host further malicious content, often disguised as game hacks or generators. The document body and heuristics indicate a lure for popular games like Roblox and Coin Master, aiming to trick users into downloading further malware. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/roblox-free-clothes-boy-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/free-spins-coin-master-hack-2021_GM406889139.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/free-clothing-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/spiele-hacken-pc-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hacker-day-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-android-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-t-shirt-free-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-account-hacker-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-siging-i-n_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-avatar-com_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_off00002dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD8 21924 bytes
SHA-256: 97a96aa7abfe36852a695c940c055888991033bd77b6ed8998048de09e6a767a
font_01_sfnt_off00005e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 19100 bytes
SHA-256: 6ec62df11c355ff279fa3c7a0c338f0b0067de5a1755b17c6549fb9f3e0233e9

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