Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a76270c51386d7…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 04:25:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 57248df39fa16d6ab83ba1f7654e7d3c SHA-1: a04bc595a7e265510cec2b3c8c737fd89ec1d2f6 SHA-256: e5a76270c51386d7dde7fbc2a30756461f507ebc1f870b750e30e675395fa0a6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Roblox accounts' and a link to a redirector URL. The ML classifier strongly indicated maliciousness, and the document body contains obfuscated text and multiple URLs pointing to potentially malicious content. The primary attack vector appears to be social engineering via a fake generator/hack lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/free-roblox-accounts-past-game-hack PDF link annotation
    • http://perpustakaan.ipts.ac.id/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-on-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-a-hacker-out-of-your-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-actually-get-free-robux_GM431946152.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_004_off00005163.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5163 25364 bytes
SHA-256: 8feef9c0ea7ad22e687558158761e0298c81bba5f2c071002266f4a1b1dba8df
font_01_sfnt_off00008c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C34 18572 bytes
SHA-256: 270deb0f3e2a922541a0f03567c05650b707bbd43b173f2cfdbde2fcd4a269a3

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