Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab6b620049132de…

MALICIOUS

PDF

43.8 KB Created: 2021-05-01 05:16:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 21965a97976f9cd202507bcb3f4fec01 SHA-1: 52796be1fa4814bf4f796b9767fd1204876ddcd8 SHA-256: 8ab6b620049132de202ea1f784997b06bc3bfe7c93aa1a277826b14dc63cbd61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The primary link leads to a site offering 'como recuperar mi cuenta hackeada de roblox game hack', indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 https://netcdn.xyz/app/431946152/como-recuperar-mi-cuenta-hackeada-de-roblox-game-hack In PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-cheat-in-roblox-prison-life.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-and-builderclub.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/cheats-for-retail-tycoon-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/javascript-robux-hack-pastebin.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/hack-app-for-roblox-computer.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-without-password-or-email-website.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-hack-generator-2021-no-human-verification.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-deathrun-hack-script.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/roblox-dragon-ball-rage-hack-script-pastebin-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-crosshair-hack.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_003_off00004490.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4490 29400 bytes
SHA-256: 729d792d97a93a1274d87223a36ee5af4ef56365698f0de35dafbe6231c09286
font_01_sfnt_off0000860e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860E 19520 bytes
SHA-256: 919dcc93db7fbc554c1fb6c884477f224b21679865b07f91aede76c490c07c4f