Malicious PDF — malware analysis report

Static analysis result for SHA-256 7823b1e63409c9af…

MALICIOUS

PDF

42.1 KB Created: 2021-04-26 06:40:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bd9d9cdfd6618cc31e8b9ed40024ffc9 SHA-1: 098e4ea3d00d403d7e87b2d5a49ced87eb808263 SHA-256: 7823b1e63409c9afd937c8bf723512aab8c0f8d5c965c179a84e16f616eacd52
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as game hacks and generators. The ML classifier also flagged this PDF with high confidence. The document body and embedded artifacts suggest a lure to download or access external content, likely to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/hacks-para-roblox-jailbreak-2021-descargar-game-hack In PDF document text
    • https://www.hobbypcb.com/images/working-free-robux-server.pdfIn PDF document text
    • https://www.hobbypcb.com/images/inf-jump-hack-roblox.pdfIn PDF document text
    • https://www.hobbypcb.com/images/how-to-get-free-tokens-asssassin-roblox.pdfIn PDF document text
    • https://www.hobbypcb.com/images/free-22-500-robux.pdfIn PDF document text
    • https://www.hobbypcb.com/images/roblox-cheat-codes-2021.pdfIn PDF document text
    • https://www.hobbypcb.com/images/free-robux-codes-list-pastebin.pdfIn PDF document text
    • https://www.hobbypcb.com/images/block-hunt-hack-roblox-pastebin.pdfIn PDF document text
    • https://www.hobbypcb.com/images/how-to-get-free-hats-and-gear-on-roblox.pdfIn PDF document text
    • https://www.hobbypcb.com/images/roblox-money-hack-lumber-tycoon-2.pdfIn PDF document text
    • https://www.hobbypcb.com/images/free-robux-gift-card-codes-giveaway-live.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_003_off000043cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43CD 25580 bytes
SHA-256: 87018fbe40b1dcac29ee8a3f617792a72c1dd56479d71b391cb3c36b058c57f4
font_01_sfnt_off00007f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 19480 bytes
SHA-256: a36f55929e2f666054a911a134206a5a8fd21c2193bc3b4f4575ad6bfa6072a5

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