Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a9302d3975118f…

MALICIOUS

PDF

41.3 KB Created: 2021-05-23 21:07:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a8f3de1ddc9d4389a71edb936147ba99 SHA-1: b8a14e033d68b689afa6e7222b0cee4207045109 SHA-256: 63a9302d3975118fce1aa7aa17f34b38a21f72ad92a9746c1adf41ef049142eb
160 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector URL that promises free in-game currency and hacks, indicating a phishing or scam lure. The document body explicitly mentions 'Free Robux Not Fake' and includes a call to action to access a generator. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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-not-fake-game-hack In PDF document text
    • http://bodyguardsecurityservices.com.au/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://bodyguardsecurityservices.com.au/images/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://bodyguardsecurityservices.com.au/images/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://bodyguardsecurityservices.com.au/images/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://bodyguardsecurityservices.com.au/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003417.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3417 33976 bytes
SHA-256: cfed3963e8d607dff71b0d0a54a444ee2e181c4fd6c3b0fd7c5522d879714ff4
font_01_sfnt_off00007fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAD 18516 bytes
SHA-256: ca79d80576681ece98af22104654f282f19bfdcccdd95bbb76316d29f9029162

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