Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f9ab1e0ded70c6…

MALICIOUS

PDF

43.1 KB Created: 2021-05-13 22:21:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 212cd34231c67232147943bbb3dac057 SHA-1: bd01efcad9d7e8075932584deca0f28023c02c57 SHA-256: c7f9ab1e0ded70c690ab64a92c115820dd071e35a5e839eeb5e9e90854fbd5b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a 'free generator' or 'game hack'. The primary link, https://netcdn.xyz/app/431946152/get-free-robux-gg-game-hack, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious website, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/get-free-robux-gg-game-hack In PDF document text
    • https://www.sarsen.net/uploads/files/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-robux-hack-generator_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
stream_003_off000048c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C4 26468 bytes
SHA-256: 31df4e043662fb8feb473a80c43cc567ae1a346eea0d8472cd0727c5a4dc3855
font_01_sfnt_off000085a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A7 18404 bytes
SHA-256: a620f98cb15c08eca6701d9d96f4312c6f7f29e614ee37dc069d73b3fa28970a

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