Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e99bec76ce2b8d…

MALICIOUS

PDF

42.1 KB Created: 2021-04-24 23:23:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0fe0fb4bbc987e671ae2de17be42e5b7 SHA-1: c3eb4436570917cef374328584ab4e92fcd09129 SHA-256: 35e99bec76ce2b8de4afd1533294034325b309962c9e5b5f5edd8457883d9d69
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to Roblox game hacks, directing users to a suspicious URL. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting a malicious site, likely to download further malware or engage in phishing. The primary IOC is the redirect URL used in the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.xyz/app/431946152/roblox-free-draw-alpha-2-discord-server-game-hack PDF link annotation
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-cafe-roblox-gropup.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-how-to-get-free-hats-on-roblox-high-school.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-hack-gir-on-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/using-cheat-engine-to-hack-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-promotional-codes-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/noob-vs-pro-vs-hacker-roblox-pet-simulator.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/hacks-on-robloxs.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-jailbreak-money-hack-download.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/get-free-robux-2021.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/robux-hack-no-survey-and-no-user-id.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_off00004433.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4433 26552 bytes
SHA-256: e049b9d2dd63eb474c137e9fdb96694a12a90dab10b0f8c17fb6a45fb1944c06
font_01_sfnt_off00007fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBB 19384 bytes
SHA-256: 7b442c614266722c8d0332bbc328ce1282c05d6380dcd01ff22302755b6e6f05

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