Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd27cd347af8baed…

MALICIOUS

PDF

41.1 KB Created: 2021-04-29 06:47:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 266a1b246054b2971aeb95d8dbf3b31b SHA-1: 701ca0eaf54c8c7e5439f54f0ea2e143b775c76a SHA-256: fd27cd347af8baed2279f47f82baa55c085bda0f8575e87eb18a2886eb07f052
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'game hacks' and 'generators', with one primary link identified as a malicious redirector. The document body, though partially corrupted, contains references to these lures and the malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/free-draw-roblox-bucket-game-hack In PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/admin-panel-roblox-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-someone-on-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/anime-roblox-roblox-face-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-cool-clothes-roblox.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/roblox-gun-simulator-money-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-create-a-free-account.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-glitches-and-cheats-for-lumber-tycoon.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-use-cheat-engine-on-roblox-swordburst2.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/change-roblox-name-for-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-vehicle-simulator-hack-2021.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_off000042be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42BE 25688 bytes
SHA-256: 0088ef805ec520b2a52978f143d82e4bb93ecf510c38dd8554c3d770c23b9436
font_01_sfnt_off00007cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFE 18920 bytes
SHA-256: 137f9277f493c8f581c60d032d7f4d4cc50ebbd8801d5be574a5a67fbaeca053