Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd3a9747f13e9a2…

MALICIOUS

PDF

43.1 KB Created: 2021-04-28 01:46:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ef65d060ee93bc6a336cfbbb37a6d7ac SHA-1: 2c346a2d2459643ffc7507cce9be9a5b32c260b2 SHA-256: 6fd3a9747f13e9a283ac48876ab5a5ae0f65a0b0eb14fe97131629c472504464
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains multiple heuristics indicating a malicious intent, including a lure for game hacks and credential phishing by impersonating Microsoft. The primary malicious URL, https://netcdn.xyz/app/431946152/creeper-roblox-free-game-hack, is presented as a call-to-action. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to a potentially harmful site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9855

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/creeper-roblox-free-game-hack.
  • 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/creeper-roblox-free-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/roblox-snowman-package-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hack-and-cheats-apk.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-robux-by-playing-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/teleport-roblox-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-be-a-hacker-on-roblox-ipad.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-robux-legit-with-proof.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-codes-2021-pastebin.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/lazyblocks-com-free-robux-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/cool-tshirts-for-roblox-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/friv-roblox-free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F11 26224 bytes
SHA-256: c668fcde2245800bdd90f8f227dd1697ff015d57790849863d41d01171944fa7
font_01_sfnt_off00007a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6A 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8712 18124 bytes
SHA-256: 26034db52493e310bac6c983e0f68e20e56ca19f690eb2af424ebd560e5cb8dc

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