Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d962db40ddea45…

MALICIOUS

PDF

38.5 KB Created: 2021-05-24 00:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c8c0ab4f85c686eef927cfdb3184b53c SHA-1: cccd986148a16655f976946a48238e55df5522e9 SHA-256: c0d962db40ddea4545910a82ebd0e12cbd279a3fdeb0fdf7828b74d1fc5de38b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The document body and heuristics indicate a lure to a redirector hosted at netcdn.xyz, which is associated with malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt.

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/how-to-get-free-robux-without-verifying-2021-game-hack In PDF document text
    • http://hcberg.com/images/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://hcberg.com/images/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://hcberg.com/images/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://hcberg.com/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hcberg.com/images/robux-gift-card-free_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_off00003474.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3474 25748 bytes
SHA-256: 1b07e05752d4df6d210e1034a248a66790da5af7190d50a61025b9b70b7633b1
font_01_sfnt_off000070c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C1 19772 bytes
SHA-256: 854662d4ed02eaea1b0a0020fc7ac25fa5b331288bf96b43491be4028b138ed1

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