Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b64346154ecc3e…

MALICIOUS

PDF

36.1 KB Created: 2021-05-23 08:51:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4d2225bf0f15a0bc5bf4f9bf9ac5a20 SHA-1: 1212587cdc051df323afbbc926d3dbbbab5ec12c SHA-256: 21b64346154ecc3ed10b19537f3aa8c3766d43d44c817da29041f3b0c7df61b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as game hacks or free spin generators. The document body and heuristics indicate a lure to trick users into clicking these links, which likely leads to further malicious content or malware downloads. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive content and malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/406889139/get-free-spins-coin-master-game-hack In PDF document text
    • https://donrazvitie.ru/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-tiktok-views_GM835599320.pdfIn PDF document text
    • https://donrazvitie.ru/images/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-spins-on-coin-master_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_off0000333c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x333C 25484 bytes
SHA-256: 01e03d3f5b1fff68f0664322332a467bc08d152b7f805c7fae3f48f851879ae6
font_01_sfnt_off00006d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1B 17884 bytes
SHA-256: b0210710b9f532dde69bab3e54691bd54d84b0d7d990975f20826afd1ba27450

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