Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f41479c376b4930…

MALICIOUS

PDF

43.2 KB Created: 2021-05-12 02:37:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e51ae20c6779e60791306177fb39ddb6 SHA-1: 7e7bf89b59dc9e8a20cf7bc64755bd593722d620 SHA-256: 1f41479c376b49304050c2d8808d995df81ea2300d59928fc861078ccca14ad2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as lures for game hacks and generators. The primary malicious URL identified is https://netcdn.xyz/app/431946152/earn-robux-today-earn-robux-today-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a redirection workflow designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/earn-robux-today-earn-robux-today-game-hack In PDF document text
    • http://www.federicocastelnovo.com/images/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://www.federicocastelnovo.com/images/free-robux-promo-codes-2021_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_off000047cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47CD 27804 bytes
SHA-256: a9a9acb935432a7634ae51159490de5b17e34dae496a36d886635be913c8457b
font_01_sfnt_off000085cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CC 18432 bytes
SHA-256: 50fc1adeb895ae30588f73a493889120d8bf728fc3821c38df9289c33b75de2a

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