Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e81cdcc61af222…

MALICIOUS

PDF

39.5 KB Created: 2021-05-17 22:38:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fc452c14d8ae93b374ceb2c299d8bb14 SHA-1: 50e0c5bed5ba5fc0d4b2c9c3c247a6fc1a26b297 SHA-256: a6e81cdcc61af22246d25dd8dfb3fbb9fcacabf0fa2248feb3ebbccfa0e67fda
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating a malicious redirector lure, specifically advertising a "free Robux generator" or "game hack". The embedded URL leads to known malicious infrastructure. The document also contains instructions for a password-protected archive, a common tactic to bypass security filters, and mentions "CLICK HERE TO ACCESS ROBLOX GENERATOR", reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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 https://netcdn.xyz/app/431946152/free-robux-survey-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
stream_003_off000033e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E1 31280 bytes
SHA-256: 34cdc44cee94b80779186607f158eb7e78d73828c3545502b4d88f81e4a61985
font_01_sfnt_off00007963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7963 18308 bytes
SHA-256: 74a940f1217583ab80956cd168fb81f959241543e2b3413e790743682303989f

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