Malicious PDF — malware analysis report

Static analysis result for SHA-256 8078f9ca9a667cf8…

MALICIOUS

PDF

37.4 KB Created: 2021-07-03 14:35:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7dd37702cec28afde0fefbe43794e993 SHA-1: f1d13a48d9bb491a40eb04f4cda232308a8ea848 SHA-256: 8078f9ca9a667cf8f970e1d9957d7d17e7a450a9c2dd672d018d361e6883aa7d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting "game hacks" and "generators". The document body and heuristics indicate a lure for users to click these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.tw/app/431946152/give-me-robux-game-hack In PDF document text
    • http://lib.unar.ac.id/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/cool-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-apk-hack_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/robux-freee-hack_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-roblox-hats-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-phantom-forces-hack-2021-august_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-snow-shovelling-simulator-hack_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-hack-version-2021-download_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
font_00_sfnt_off00003ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AD0 22604 bytes
SHA-256: cadcc92e5dab17c04f228a0d12a1318cda68c311480fe997dca7a055724db355
font_01_sfnt_off00006d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D86 18984 bytes
SHA-256: 4e46e4fba873faa5c118d7fc25cc80c06536480829301173d0374a806a09fbcf

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