Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1afa35f400a3e4a…

MALICIOUS

PDF

37.2 KB Created: 2021-05-21 11:39:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 858d2fa76c587aa655cd5a52e72ddeec SHA-1: 10d8e288fe523c6ded671dea09edb4e578ac7118 SHA-256: b1afa35f400a3e4a8d2c6ec895baecbc91ff47e8701c9eded3ee0380d7f54f9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising 'free Robux' or 'game hacks'. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering lure designed to redirect users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/free-robux-games-on-roblox-game-hack In PDF document text
    • http://legs11.co.za/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/whats-robux_GM431946152.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
stream_002_off00003420.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3420 25448 bytes
SHA-256: 3dc1f86541397bd42008916952592f1fe4ea3aa0ad5f3d0c5026d6d34d0d058b
font_01_sfnt_off00006f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F66 18576 bytes
SHA-256: 121d272924a8948b6bfdf19867642727f57edf659587de43eb46571e5003926c

Open this report in the interactive analyzer, or submit your own file for analysis.