Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f2fd37e6452aa1…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 04:14:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c29b018929468741c60be613602bfb24 SHA-1: 73c8d9956a215182607365ca2e6c31298db24e03 SHA-256: 69f2fd37e6452aa1f2304ccba52371672f9b74141f330197b39e34ef7931660d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a "hack coin master" lure. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/hack-coin-master-for-free-game-hack In PDF document text
    • http://library.umla.ac.id//repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/pubg-uc-generator-without-human-verification-2021_GM1330123889.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-15-free-spin-link-today_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_004_off000051c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C0 24524 bytes
SHA-256: 94f176af08e4f1b517c2ebb4bd48880ea824af798f0aaf64c317c0f0583753de
font_01_sfnt_off00008a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A34 17880 bytes
SHA-256: 257aee740a5ae17e91b93ad4d540c168849f24efe28ef42b55966c96749a0114

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