Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b76622f46598e7…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 00:05:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5a52c26ebd34d402c0019a3f9e3236f4 SHA-1: e9901c3ca1c29a3a513b37e9816816322950cb8a SHA-256: 86b76622f46598e7501b521cba583a2499044549512aa8ab8081413229961500
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links designed to lure users into clicking on what appears to be a 'free generator / game hack'. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The presence of a visual download button further supports the lure tactic. No scripts were extracted, limiting the analysis to the document's embedded links and lures.

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/479516143/minecraft-windows-free-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-coins-link-2021-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_off00004f68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F68 25828 bytes
SHA-256: 2179f5fbb34137f34ccad7a79268201f1cc8a0bd08a5b0e1df912a60d4da6dbc
font_01_sfnt_off000089d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D8 18244 bytes
SHA-256: 17ed61b8d418eb531f0e9f48c5430b9261b703312875c5060f44484e1085bb50

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