Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59f47a10684cacb…

MALICIOUS

PDF

32.8 KB Created: 2021-07-19 11:46:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4410b1472e49974fd635484adfa3a87 SHA-1: 720cee95200cb7efcdca34f1e190acf99872fe60 SHA-256: f59f47a10684cacbe92a47216b2f021f9c6d2c651bac5dbd3a742d9362c94938
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that lead to a malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators'. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates an attempt to lead the user to a malicious site. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt, likely involving a drive-by download or further social engineering.

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/431946152/how-to-hack-someone-on-roblox-game-hack In PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-links-free-spins_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
font_00_sfnt_off00002984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2984 22796 bytes
SHA-256: adc643b19c3c46646f92e13f3fbe6dcf862f627b28ee534f3b3eb20eaa2d8339
font_01_sfnt_off00005c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C77 18792 bytes
SHA-256: 9bec9b42a66a3fadd8300817ea8ed63094da1293d480634873ce68f71127e696