Malicious PDF — malware analysis report

Static analysis result for SHA-256 f588ed66523d6388…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 14:20:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c0ac8749d3dac8f104bf7740f8d050f3 SHA-1: e5a6fa1281f9510d5d067d4445092c33483efdbe SHA-256: f588ed66523d63886c5ae1c61d90e5205c9a4e51b0cb1ee9fd34b52f4592af7b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure, masquerading as a game hack generator. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to trick users into visiting malicious sites.

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.tw/app/406889139/hackear-juego-coin-master-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-stuff-glitch_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-generater-no-human-verificaition_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/tiktok-par-free-followers-kaise-badhaye_GM835599320.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/como-vestirse-hackear-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/pokemon-go-free-644_GM1094591345.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-hack-roblox-on-mobile_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
stream_002_off000031eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31EB 23100 bytes
SHA-256: 4f11ca31d757f70e985d5bdab8195994866fbef31ca6b4bfb11d93f171473280
font_01_sfnt_off000065aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AA 18308 bytes
SHA-256: 3544d7e777192f16e01b415bbb4cc4ce382486f30b57fac35e8304f2910641cc

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