Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2d2678dc196e79…

MALICIOUS

PDF

41.9 KB Created: 2021-04-28 17:47:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 221d4d1dea4031c626140455eee2a573 SHA-1: af8bb799cc9566fe38f746c89498e427eaadd5e9 SHA-256: 6c2d2678dc196e79c170171e3b4c7405e521d3b0d051d216c95ad64ffd9e848a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, masquerading as free game currency generators. These redirectors, in turn, host other malicious PDF files, indicating a chain of malicious redirection designed to lure users into downloading further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.xyz/app/431946152/free-roblox-gift-card-codes-2021-november-game-hack In PDF document text
    • http://www.saburai.ac.id/elibrary//repository/working-cheat-engine-hacks-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hack-menu-jailbreak-2021-abril.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-typing-cheat-to-get-money-on-blox-burg.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hack-site-no-verification.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-cheat-engine-download-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-btools-hack-november-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-items-virus.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-csgo-skins-roblox-id-audio.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-zombie-animation-for-free-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-hack-and-get-robux.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004359.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4359 26392 bytes
SHA-256: 6f99b75314ac12985585211a9ed7610f5caa9b69df7d6a5d25b70543a91f3974
font_01_sfnt_off00007e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9C 19352 bytes
SHA-256: 7019161cf25bbca8a5d53fd5280993e4cfc4acb80cdbe90d71810811dcd36d7d

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