Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f49cca614200f3…

MALICIOUS

PDF

30.0 KB Created: 2021-07-20 13:32:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bb9363306a3a2f358f006c64250d7e2b SHA-1: 129ccd04caa2f8ab583d0cac5b22d6037ea1d4a5 SHA-256: e0f49cca614200f325669fe3a831f40738718c5fb588ac25be10e3f5f6a1d042
130 Risk Score

Malware Insights

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

The PDF file contains a lure for a 'free Robux' generator, which redirects to the malicious URL http://netcdn.tw/app/431946152/free-robux-game-hack. This URL is flagged as malicious redirector infrastructure. The document body also contains text related to 'Free Robux' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', reinforcing the social engineering aspect. While no scripts were explicitly extracted, the nature of the PDF and the redirector suggest it's designed to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0556

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/free-robux-game-hack In 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_off0000202a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202A 23044 bytes
SHA-256: 110a7232720b12d32597c32a524c787f7e95b8f68cad54b2994f909af9659588
font_01_sfnt_off0000540d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540D 18200 bytes
SHA-256: af0a6f01588019b38fd5688102a8ebe17e4b5155afa3360a762aee3dff872896

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