Malicious PDF — malware analysis report

Static analysis result for SHA-256 de658fd51d5d4c80…

MALICIOUS

PDF

36.7 KB Created: 2021-05-22 04:08:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c2100605e87ecb326e238fbfbc2327e6 SHA-1: 7dd676db54e68151e2a21294754c8c77397108d2 SHA-256: de658fd51d5d4c80dceae9f89f6fa06f0742a20e5587ec8d9df7f3713bbabf6f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors, including one explicitly flagged as malicious, which promises free game-related items. The document body and embedded links suggest a lure for users interested in games like Minecraft or Roblox. While no scripts were directly extracted, the PDF structure and embedded links indicate a malicious workflow designed to redirect users to potentially harmful sites.

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/479516143/free-minecraft-accounts-reddit-game-hack In PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-raid-hack_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_off0000348e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x348E 25784 bytes
SHA-256: 5f6fb96c32ccbf030d2e5c80bc5d86aacc5f317075f9d2c2800966ad93bfbf7d
font_01_sfnt_off00006ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF2 18024 bytes
SHA-256: 8cc2f99dc924a15d52918b37ec4a77595277c9fc296e6ac0964170e61a15a16b

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