Malicious PDF — malware analysis report

Static analysis result for SHA-256 28adb71250513f14…

MALICIOUS

PDF

37.2 KB Created: 2021-05-20 14:26:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 801ca12e0c39c2105aabf3525281a82f SHA-1: 92d5851adea246b9d4233b2e8a25c6661d237d87 SHA-256: 28adb71250513f14fa85fce66a35cd089738ecaf150c34af1ebfc2a2a7842b93
122 Risk Score

Malware Insights

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

The PDF document contains multiple links and references to 'free Robux' and game hacks, acting as a lure to redirect users to malicious websites. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of external URIs strongly suggest this is a phishing or malware distribution attempt. While no scripts were directly extracted, the nature of the lures and the ML classification indicate a high likelihood of malicious intent, possibly involving exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-apk-game-hack PDF link annotation
    • http://www.homesweethome.pl/images/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/rbx-free-robux_GM431946152.pdfIn 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_002_off000034d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34D5 26256 bytes
SHA-256: 9278024481a5c4ffaaa698377475ede4e1fe91f08d41fadac548358adf8f5aad
font_01_sfnt_off00007013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7013 18360 bytes
SHA-256: e9359734bc9145e2b26d31ba7f580aebc3bf98c57002eb6e857d81b76a5cddb9

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