Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d94142a85132dd…

MALICIOUS

PDF

44.3 KB Created: 2021-05-01 02:37:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 885342f7211c33885f8ad8a12ad69700 SHA-1: f71e39c1eed3b0f77f0e1f10d3a589aad4d757a3 SHA-256: 23d94142a85132dd37181905f78be9a04423322cf3872149bd371ae8afe7e097
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a 'free generator / game hack' lure, directing users to a suspicious URL. The document body, though heavily obfuscated, also contains references to the same URL and other potentially malicious links. The presence of embedded URLs and the nature of the lure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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/golden-chain-shirt-roblox-free-game-hack PDF link annotation
    • http://technibuild-group.com/uploaded_files/userfiles/files/free-private-server-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-skeptic-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/best-free-outfit-in-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-robux-2021-hack.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/furky-safe-and-free-roblox-hacks.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-use-a-cheat-on-roblox-jailbreak-2021.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/free-roblox-accounts-2021-pastebin.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-lua-scripts-hacks-money.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/roblox-urbis-cheats.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-and-tix-button-game.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
stream_003_off00004382.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4382 26028 bytes
SHA-256: 3fb7350fcad9326beef78f24d0af4d1e80726024d25e309f2a36c083d981c317
font_01_sfnt_off00007ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA4 3312 bytes
SHA-256: 40bd8eebcb3a0d68a8646f1930e84f30a44bfa48525263c6c528f0bc1e9c1677
font_02_sfnt_off000089f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F3 18740 bytes
SHA-256: ef5ad558eb2a45d38fbc9535b71c0ebb131c0d6e1c27edb164eefa098caf2cf6

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