Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce28f38b74fa5a37…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 14:03:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ceec9d16a2d2444439684421108b5e50 SHA-1: 36eb7c7906c61827b407637ea8546eeddc0cca0c SHA-256: ce28f38b74fa5a3729a1a06fe4bec7042c08754ea6e2a728d48c2fcae7dfc993
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "game hack" or "robux generator", directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the embedded URL is a primary indicator of this phishing attempt. No scripts were extracted, but the document's content and heuristics point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://netcdn.tw/app/431946152/get-robux-today-game-hack PDF link annotation
    • http://itc-nekretnine.hr/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-new-hack-exploit-2021-still-works_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-18_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-jailbreak-noclip-and-speed-hack_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-hack-roblox-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/hacks-for-pet-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/kachifpro_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-pastebin-no-wait_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/lazyblocks-com-free-robux_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
font_00_sfnt_off00003141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3141 22860 bytes
SHA-256: 1357587a1b93bf377d8acd44c14b3fe33dffc35d58ab70a76c443e5d2391fe47
font_01_sfnt_off0000647f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647F 19012 bytes
SHA-256: 9215c9201218ab6c8d10252376bfc8cd06165ecb9060389a52a88ae940a9f8ad

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