Malicious PDF — malware analysis report

Static analysis result for SHA-256 e842c77bad831e28…

MALICIOUS

PDF

37.4 KB Created: 2021-05-23 17:54:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f5a040066ada74f6a63b1e6d5c35bf13 SHA-1: afa4a1dbc99cc347389decdc80f1d014ca4cd093 SHA-256: e842c77bad831e28da9399d28e8b52e76afc825c5bf326f543258f4dc4a524fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and a specific URL associated with 'game hacks' and 'generators', indicating a lure to download malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to trick users into visiting 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/431946152/how-to-hack-robux-game-hack In PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/wurst-18_GM479516143.pdfIn PDF document text
    • http://tc-kulmbach.de/images/how-to-get-minecraft-windows-10-for-free_GM479516143.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_off00003541.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3541 25760 bytes
SHA-256: 5c046dd1a1000499c6e5cf0b7147dad15b80af502969929ee0fe2b64c07efe98
font_01_sfnt_off0000703f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x703F 18412 bytes
SHA-256: 799ae8847f356c5b4d712fc876b96dd84d848442331064266ecb6e470ae97e62

Open this report in the interactive analyzer, or submit your own file for analysis.