Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfa75ec062915e5…

MALICIOUS

PDF

35.2 KB Created: 2021-05-22 09:09:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1f012eebaef4d35b47177534e6237b75 SHA-1: d494d7f6384fffdb65fe98dff8803921b5d1c02b SHA-256: 2cfa75ec062915e57340efbcab27315869aeae257ce859fdfd296ae4464d928d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a 'free Robux' generator, a common lure for malicious content. The heuristic firings indicate that the PDF links to known malicious redirector infrastructure and is flagged by an ML classifier. While no scripts were explicitly extracted, the nature of the lure suggests an attempt to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-for-kids-game-hack In PDF document text
    • https://javisintlmedia.com/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/make-free-robux_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-spins-coin-master-links_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_off00002fef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FEF 24484 bytes
SHA-256: 8d426d13eae50fce154b09f8613869167f3cef71388955921e23172ef20a9ed9
font_01_sfnt_off0000683e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683E 18308 bytes
SHA-256: 763c1f2cd60606b291f89f2a80f52d083a3bf80be883c0f2186ef0e0ffb8dff5

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