Malicious PDF — malware analysis report

Static analysis result for SHA-256 a821c48b6e59d5ae…

MALICIOUS

PDF

34.9 KB Created: 2021-05-22 14:35:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 73b3a738c99a55459032a897ab43ef08 SHA-1: d43a61342ae5f9ba7d496862d71eb0e6fd24bd23 SHA-256: a821c48b6e59d5ae0f6882f6d93f242c92a92b3a0301c9c9a539d5d707d3145d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple embedded links that redirect to malicious infrastructure, masquerading as a game hack or free currency generator. The document body explicitly contains phrases like 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', reinforcing the lure. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/minecraft-free-install-game-hack In PDF document text
    • http://plastic-surgery.pl/images/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://plastic-surgery.pl/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://plastic-surgery.pl/images/how-to-gift-robux-on-mobile_GM431946152.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
font_00_sfnt_off0000320f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320F 24232 bytes
SHA-256: 14b591aeed3469da29f68b99d8f8db6ca2df297ac1f98a7b8137d9cc21921bf0
font_01_sfnt_off00006933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6933 17644 bytes
SHA-256: 633b33bb140344f1759210963491f1aee0e41bd13e53d96deaa22883d252c2f8

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