Malicious PDF — malware analysis report

Static analysis result for SHA-256 396af7374077c969…

MALICIOUS

PDF

36.9 KB Created: 2021-05-23 08:12:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 45b13349a056c32ff547e9754a528460 SHA-1: 2c08c98d2b2e1997ab258d3ff540c03a3ddbd13b SHA-256: 396af7374077c969ebebfcae3f6b4c0eb0792972a03a57a862aa53eb73925d61
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a QR-code lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/479516143/how-to-hack-a-minecraft-server-game-hack PDF link annotation
    • http://medinup.pt/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/roblox-robux-hack_GM431946152.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_002_off000035b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35B3 26104 bytes
SHA-256: 8144cdb57a06d20b9a05b18bfd544af3d0be8994e0686469a637568347213726
font_01_sfnt_off00006f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 18156 bytes
SHA-256: a161276dde2563737e729d23e9d7b4e88663ff4ff7cddafc48ded70db5af995a

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