Malicious PDF — malware analysis report

Static analysis result for SHA-256 e023f32386079009…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 19:39:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9ac687026c99dc94461504d7b1603ba3 SHA-1: 39dc796e210f19c583f48d8e0bca6c61c3fb7e3f SHA-256: e023f323860790094b442dd3246257c67e3b9666864d4c172bebf5622cdd1201
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites offering free game currency or hacks, which are known malicious redirectors. The document body itself contains embedded URLs pointing to a malicious IP address and further PDF files, likely serving as a lure for users to download potentially malicious content or be redirected to further phishing sites. The ML classifier also strongly indicated maliciousness.

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.tw/app/431946152/how-to-get-free-robux-without-verification-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/roblox-exploit-free-2021_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/earn-5-robux-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hacks-de-roblox-may-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-account-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-virus_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-use-cheat-engine-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/phantom-forces-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-topp_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/using-cheat-engine-with-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-bee-swarm-simulator-cheats-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-how-to-get-free-robux-not-clicbait_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_off00002e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E85 22396 bytes
SHA-256: 777fd02c0e23f10d36a7a99cb5ae0bcd342dcb34fa7a518e5ef8d4ada6c0c3a2
font_01_sfnt_off0000600c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600C 19604 bytes
SHA-256: 58b409e880d8c8c8f611c8851265b785a46b2984af904f55916f4ac6f211fe18

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