Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfeb5534cfea4cd…

MALICIOUS

PDF

29.9 KB Created: 2021-07-19 23:52:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d1b4ed508c112ab534c92defd1a708c1 SHA-1: 8cb5fde6a2e23c541380d9d588bf3ff64e850efa SHA-256: 9bfeb5534cfea4cde183bedde63a2a7145901e9a45ef69e32788ecdfb1eb63e3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux No Verification' and a prominent call-to-action button, directing users to a URL associated with malicious redirector infrastructure. This indicates a phishing or scam attempt, likely designed to lead users to a malicious site or download unwanted software. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0560

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-no-verification-game-hack In 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
font_00_sfnt_off0000216c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216C 21860 bytes
SHA-256: 310a3cd74654386b69f17dbf643043a1b42e3b5793a9faa36da988175cc4a19b
font_01_sfnt_off000051b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51B0 18788 bytes
SHA-256: 62238c1786e5e6676ca02185530fe02245788409f30e6753b3bb97f9a85103fa

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