Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af4f6cea7a96036…

MALICIOUS

PDF

44.6 KB Created: 2021-05-14 10:15:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1e21f4a8433f91c6435a4b4c8e216aee SHA-1: 9a7fb9b946d1ec3932491c098a66c160860b2322 SHA-256: 2af4f6cea7a96036068c67e7a50531b45ae8643d18fc31120f858089d600e089
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a 'free generator / game hack' lure, indicating a social engineering tactic to trick users into clicking malicious URLs. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/coin-master-free-2021-spin-link-game-hack In PDF document text
    • https://malungtreks.com/userfiles/files/free-coins_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/kachifpro_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-spins-coin-master-links-blogspot_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
stream_003_off0000500e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500E 26088 bytes
SHA-256: 92d3e4b7919a83877a59f4ca6f92d37b253c21da27ef2b08aa44629978c69381
font_01_sfnt_off00008b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9C 18456 bytes
SHA-256: b7ae3d16bb028351929840db057611194e7c02105e6dbd3e36d0326cc4cd0414

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