Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d31d23968964bf…

MALICIOUS

PDF

37.0 KB Created: 2021-05-22 21:43:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 574d475697e0d91f8fea73c039bc3d5c SHA-1: ae7ffda57552b71844a840043faae27ea4b98d00 SHA-256: 93d31d23968964bffb1131319c383396c05e767e1e84cd42b9cb50fcfeab1de2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 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/479516143/can-you-make-a-minecraft-server-for-free-game-hack PDF link annotation
    • http://dieter-sauter.com/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-daily-free-spins-link-today_GM406889139.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_off0000334c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x334C 27792 bytes
SHA-256: 876b2c65503caf1ac02f47d0f56ccdaa6382a6511cabb8ba040527e4d93853e5
font_01_sfnt_off00006f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F57 18296 bytes
SHA-256: 7b2a5025a6b2eafbb08597cb19c0e2dd24287b9ce61b32a45f1f6eb7f3859dea

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