Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f6c2c3d8f9a5b3…

MALICIOUS

PDF

32.7 KB Created: 2021-07-20 00:30:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fae3617c5c6e321c32add5f67c356aec SHA-1: 6567954d276078c4fddbe3f25761a8c288204db8 SHA-256: c2f6c2c3d8f9a5b396c5dcb2ab8decccb7d74ff8b5832b3447ef7fc3d117af5c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting a 'free generator / game hack'. The document body includes a call-to-action phrase and multiple URLs, suggesting a phishing or scam attempt to lure users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/479516143/free-minecraft-java-edition-game-hack In PDF document text
    • https://brainpads.com/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/free-robux-master_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/robux-hack_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://brainpads.com/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/free-robux-with-no-verification_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
font_00_sfnt_off00002d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D86 22392 bytes
SHA-256: 1e792b0caac2edabfd058a1bbcd617cd3b4a990b7ef759cdf12907895826d0c0
font_01_sfnt_off00005e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5A 18164 bytes
SHA-256: c8dc3c0ccaec2cbfabf4f7c22776233ed86b35e7dce69fc624c99833f95d0764

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