Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d0b536e628662c…

MALICIOUS

PDF

31.5 KB Created: 2021-07-19 23:42:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c3513b5d86736b05f43c1959d2ade5b3 SHA-1: 86ecd434cb2c9dc9db682dd56b0b50daf52910c7 SHA-256: 04d0b536e628662cf005bc235ad7ec28ecfd2512dbaa9bc701807409e6e037bc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, disguised as game hacks and generators, which is a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 http://netcdn.tw/app/431946152/robux-free-2021-game-hack In PDF document text
    • http://hilro.co.za/images/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://hilro.co.za/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/free-modded-minecraft-server_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2884 21492 bytes
SHA-256: 5b61c2b8a5d8045b91f4c3734b18f4c7408c28c0c054010ad43f0c37bba1ef66
font_01_sfnt_off000057b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57B9 18600 bytes
SHA-256: 707a6d454891e35f388a0d8205a2e46c0fc3a373aa9514799a3734f761808fc4

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