Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a85803348ab781…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 03:26:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d7b50e24fabab357e45deee4ec36843c SHA-1: c28b4de01e27921186dc08d5739a1fcd2f9a90f1 SHA-256: f9a85803348ab7812661a9740868ffc32ff3295b9ec936696940ea562d3478a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'Coin Master' hack generator. The heuristic firings indicate that the PDF links to known malicious redirectors and lures users with a game hack theme. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely leading to a phishing or malware download site.

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/coin-master-online-hack-no-human-verification-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/corn-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/promo-codes-for-free-robux_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_off00004d47.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D47 25872 bytes
SHA-256: 6be9db965a638dcb0f7960304b2ff0b15cc36417eac2d1efe36c7f555af947f1
font_01_sfnt_off000086df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DF 18324 bytes
SHA-256: 134a3b787304aed0b6b676c1c78e20bf5ecb3967929c4b7a7c4fe4be2e6ca943

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