Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea030211f2957231…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 23:04:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9b7008fe5354eeb29120e5dfb211f486 SHA-1: e15020961eeca0b1ac6731b4ae3051f33c451e7a SHA-256: ea030211f2957231bfb01ebf9f113fbf170adef7459fe07fe1f79af016347544
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into downloading game hacks or cheats, specifically targeting popular games like Roblox and Coin Master. The document body and heuristics indicate a redirection to malicious infrastructure, likely to distribute malware or facilitate phishing. The presence of multiple links and the ML classifier's high confidence score support this assessment.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-hack-download-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-robux-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/hack-de-roblox-robux-espaol-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-retail-tycoon-cheats-xbox-one_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-jailbreak-free-money-codes_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-rocket-fuel-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-catalog-items-on-roblox-vortex_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-add-cheats-to-a-roblox-game_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-a-private-server-roblox-jailbreak-for-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/google-only-roblox-items-free_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_off00002efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFD 22144 bytes
SHA-256: ca25d49f8e4710669d7bb41db11f1d2c90eb4306402d614ba6fc5d538cca7cb0
font_01_sfnt_off00006019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 19160 bytes
SHA-256: 20e8ef43e122870d61f5f3bdc7785651657b4c6f8223466300bbb50b4def8f00

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