Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a2e2bd2953a522…

MALICIOUS

PDF

36.2 KB Created: 2021-05-07 09:55:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 81e38f4da755936ba7593405a56dce1b SHA-1: bd2b1e306a843880cb43316596bc75c6f5bbe421 SHA-256: d4a2e2bd2953a5229bf88faf0518391f1c02bd1b607e1c62460fdaeb218bf7e7
130 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a lure for game hacks and redirects to known malicious infrastructure. The embedded URL, https://netcdn.xyz/app/431946152/free-giveaway-robux-game-hack, is identified as malicious. The document body and metadata suggest a phishing attempt disguised as a giveaway, likely intended to lead the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier clean score 0.0302

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-giveaway-robux-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_off000033b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B4 25284 bytes
SHA-256: 936a70e5d9ce27ab1518251c25425fcbd3596defb60ec2af218f3af4c19bb848
font_01_sfnt_off00006ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCB 18052 bytes
SHA-256: f6f169b2d62f343b2f24867cdcdaa0f027999cb219decdaa2544b0b54eb68127

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