Malicious PDF — malware analysis report

Static analysis result for SHA-256 66300effc1d611c0…

MALICIOUS

PDF

33.7 KB Created: 2021-06-23 05:24:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a42fe82624e0461d6e665a578979f9a3 SHA-1: 994939d1f2a561934fa8726cb5bdbb18d5a8da56 SHA-256: 66300effc1d611c0c9df7c92ba6f7b727fdbb8b479a9613bb58e734015fa671e
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 game hacks and generators. The heuristic firings indicate that the document is designed as a lure to redirect users to potentially harmful content. Although no scripts were extracted, the embedded URLs and the nature of the lures suggest a phishing or social engineering attack, likely delivered as an attachment.

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 http://netcdn.co/app/431946152/cheat-code-roblox-hunter-simulator-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hacks-pc-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-item-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-download-a-swearfree-roblox-speech-pluggin_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-model-scanner-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-roblox-hacker-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-verify-2021_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
font_00_sfnt_off00002d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3C 22276 bytes
SHA-256: 51fabb67c204cad8d5144f4af0f116f554f77b28fa6a6caa671ffc03b3024588
font_01_sfnt_off00005daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAF 19448 bytes
SHA-256: 825c46bd7a9d4f5e483accbf8735528c79dccb398bd8812f0194c7ef1e1b6fb2

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