Malicious PDF — malware analysis report

Static analysis result for SHA-256 156bde5a86809e3b…

MALICIOUS

PDF

39.6 KB Created: 2021-05-22 06:41:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c635c19ffa76bcac850694176c45aab7 SHA-1: 78e16dc1e3274fbf4ffeb6f859e7190a99a244ea SHA-256: 156bde5a86809e3bb890a032f03a59e82ca8365cd2b8a51aa2450974e6787c9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games like TikTok and Coin Master. The document body includes a call-to-action button and embedded URLs that lead to these malicious sites. The primary purpose appears to be redirecting users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/835599320/freer-tiktok-game-hack In PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31EB 28012 bytes
SHA-256: 481a4b2fea311c9e6d7c911354e63e76cbf7aae7d8df1d4875b94e748657e5f9
font_01_sfnt_off000070d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D0 3224 bytes
SHA-256: d57e53514f41cf338eafd3600cbc861ff53877acd0699803755d487e80f69289
font_02_sfnt_off00007bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFE 17456 bytes
SHA-256: eee1edbfcd64309e57980115a02bab568c84f21b085b7ef169a7723337a1b17d

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