Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55dbec9d6a115e3…

MALICIOUS

PDF

36.7 KB Created: 2021-05-22 10:38:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9fe1c3bed2d978db2863bdc47102049a SHA-1: d505703dfbb5aae4390d3b6cec38b2e6b54ce21c SHA-256: a55dbec9d6a115e345add3524d00da1a7996f80e6648579a4bfd21d7aca79d50
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded links and a call-to-action phrase, directing users to a malicious redirector hosted on netcdn.xyz. The document body and heuristics indicate a lure for 'free Robux' or game hacks, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and malicious links suggest it exploits PDF vulnerabilities or uses embedded JavaScript to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-robux-scams-game-hack In PDF document text
    • http://www.dciprotection.ca/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/how-to-get-free-coins-on-flip-master_GM406889139.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_off00003082.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3082 26852 bytes
SHA-256: 6be24d90aa734f3975b79e96c773ec2809064f91d2fb1626cd16fd72dc8f036c
font_01_sfnt_off00006d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D91 18500 bytes
SHA-256: f6eebadb3de4af7ab0205057cc55fc1daf9397692da1370c2a19d2d749ad11f1

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