Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fefa6d16b0f16c…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 14:04:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2ae72eaa963dd7da758672e0c23b25bc SHA-1: ddd5a951c73aeef2c51feea4edeebdc003e5d212 SHA-256: f8fefa6d16b0f16c7786384ebfd1dcf6670609c44fa210e61e85d9682b45c138
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or generators. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-websites-2021-game-hack, which is part of a chain of redirectors. The document body, though partially corrupted, contains text related to 'Free Robux Websites' and the authoring application 'wkhtmltopdf', suggesting a phishing or scam attempt.

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/free-robux-websites-2021-game-hack In PDF document text
    • https://www.labdagatismk1pundong.com/repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/roblox-top_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/ways-to-get-free-robux-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
stream_003_off0000488a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488A 25312 bytes
SHA-256: 14038ea2c20618a35dbc6a6460746f8f4d95705bfc6f930fea651c51366f247b
font_01_sfnt_off000082cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CD 18836 bytes
SHA-256: ef44fc6ccc8558fc54da3394cf76e38d99de94399ef86c3bb36f5b939f331685

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