Malicious PDF — malware analysis report

Static analysis result for SHA-256 f408fa2e0b38007e…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 01:20:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 62dc51b3be0b6c1a2bcb0ccd984bbb5a SHA-1: 6cfb71a769edbb7e3ce9a7bbbc20a4feb0123bcd SHA-256: f408fa2e0b38007e4726da45b5edd10984dc3124edf33e495a189d9737676064
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them, promising free in-game currency and hacks. The primary redirector URL is http://netcdn.tw/app/431946152/how-to-get-free-robux-not-a-scam-game-hack, which is associated with malicious redirector infrastructure. The document body and heuristics indicate a scam or phishing attempt leveraging popular game-related lures.

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/how-to-get-free-robux-not-a-scam-game-hack In PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/robux-hack-with-tampermonkey_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/what-is-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-cheating-real-no-more-playing_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-mod-apk-unlimited-robux-2021-download-free_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-cards-on-coin-master_GM406889139.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_off000031db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DB 22004 bytes
SHA-256: 8898c7ea9e480799e42f2985f5489bcf8cb40d89b4bf1d74a9f4ac5b1c564988
font_01_sfnt_off0000628f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 19244 bytes
SHA-256: 983774d3ab3dc9a6ad7d8a23e2c7ce5fcf81accc4aa13182fbdeb0a54c040bf9

Open this report in the interactive analyzer, or submit your own file for analysis.