Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf66363de29180fd…

MALICIOUS

PDF

36.3 KB Created: 2021-06-19 15:21:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 60e5e7514c6851860540e149c72b539e SHA-1: c160879af43635d2cdf67dea09c76a8d238307d8 SHA-256: cf66363de29180fd1406d3ad514df0fc6749d878fa3b564e2e9625b4a63cc180
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically advertising free Robux and game hacks. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly suggest a malicious intent.

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/free-robux-quiz-and-survey-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/raspberry-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-robux-free-and-legit_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-100-real-pc_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-free-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-only-username-no-human-verification_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_off00003371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3371 23052 bytes
SHA-256: a55fcf409bdd59862f0da65dd65af6a71b31ac58ed8f8d46e8dfd9c8734caf4b
font_01_sfnt_off0000674a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674A 19544 bytes
SHA-256: 1bdec4d18fe752b9a72ef339b7c099a2967eb0721463151c633912f2260d34e4

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