Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65dbc3239485abb…

MALICIOUS

PDF

45.3 KB Created: 2021-06-04 02:13:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6365e20a1e92277f374d23e3a247378f SHA-1: b516407a059018afb045d886f57621191abb2b67 SHA-256: f65dbc3239485abb38d591020acd3d8b6c9c8e48537686bc94372c9d174fade5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, including one that masquerades as a "free generator / game hack" for Coin Master. The document body and heuristics indicate a lure designed to trick users into clicking these links. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/free-spins-coin-master-2021-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-tiktok-followers-zonder-verification_GM835599320.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/tiktok-free-100-fans_GM835599320.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-hacka-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/roblox-free-clothes-hack_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_004_off00004f6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F6D 29812 bytes
SHA-256: 93ceb8f59ccbf8cbe8e7028f642409dcaf34e652ba9ca570f5caf6b3d2964b33
font_01_sfnt_off00008e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E67 18288 bytes
SHA-256: 9732707b45c862b7a6ef8ea2418900def9be3650c6b325207d932644f64622ad

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