Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe233f56edf8809…

MALICIOUS

PDF

40.2 KB Created: 2021-04-28 05:08:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 902ff83e507f67f62079e1da776e1cc6 SHA-1: 9bebfb6b741d03a7462937bd0bf10e15d1917904 SHA-256: dbe233f56edf8809c1854f392764e6c5088bda5d91ee73d1715431c0da3684ef
160 Risk Score

Malware Insights

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

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'generators' to lure victims. The document body, though heavily obfuscated, 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 sites.

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/dragon-ball-online-revelations-roblox-hack-game-hack In PDF document text
    • http://www.drent.se/images/free-robux-email-verification.pdfIn PDF document text
    • http://www.drent.se/images/free-codes-for-roblox-live-now.pdfIn PDF document text
    • http://www.drent.se/images/free-reedeem-codes-roblox.pdfIn PDF document text
    • http://www.drent.se/images/what-is-the-best-free-game-script-executor-roblox.pdfIn PDF document text
    • http://www.drent.se/images/free-roblox-group-generator.pdfIn PDF document text
    • http://www.drent.se/images/roblox-hack-robux-com.pdfIn PDF document text
    • http://www.drent.se/images/tampermonkey-roblox-hack.pdfIn PDF document text
    • http://www.drent.se/images/can-you-use-cheat-engine-to-hack-robux.pdfIn PDF document text
    • http://www.drent.se/images/how-to-hack-on-roblox-jail-break.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-cheats-in-roblox-jail-break.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003ed6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3ED6 25640 bytes
SHA-256: 25e5fe678d748b9bf287dc0f4e0482b9add85327085cdf809c03059ccf7c66cb
font_01_sfnt_off0000790b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790B 18976 bytes
SHA-256: d8fb5adc138a26b76e280dbb1f96e4b81f0d413c04820a9ce35bf8c73e5de6cd

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