Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae512b19434eb962…

MALICIOUS

PDF

28.6 KB Created: 2021-06-18 23:28:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aeaa24501623fd7c99ef524ce92817e5 SHA-1: 56ca54288b09a9a7c39f6f686ee416f2e1ed8c96 SHA-256: ae512b19434eb96226987730c81bab80e2dbdb2d516b10b9c13d743764c229d9
170 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack' for Roblox Bee Swarm Simulator. The embedded URL points to known malicious infrastructure. The document body also contains a call-to-action phrase and instructions that suggest a password-protected archive, a common tactic to bypass security filters.

Machine Learning

  • Nyx PDF Classifier clean score 0.0330

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.co/app/431946152/roblox-bee-swarm-simulator-hacks-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_off00001b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B39 21820 bytes
SHA-256: 008e24e75fc48a05ef744777a363abaa4c29f1c9c0edc4161c71ec9a34bdb931
font_01_sfnt_off00004afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AFE 19444 bytes
SHA-256: 84b883823283aec507ea0d8b35d33f77750391847892d7d0f31bf90d9c71e4ac