Malicious PDF — malware analysis report

Static analysis result for SHA-256 9175cf3f9959cdeb…

MALICIOUS

PDF

41.7 KB Created: 2021-05-21 13:30:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 64f1e464e9e0ab5b9ed8d5b08374d95c SHA-1: aff8c6c7290a579618bd1c441a55a0364e2d5e45 SHA-256: 9175cf3f9959cdeb74e2cb0e8901cbb9aff9669008e9716266697544b38f78de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'game hacks' or 'free generators'. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary attack pattern involves tricking the user into clicking a malicious link, likely leading to further malware download or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8078

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/how-to-download-minecraft-for-free-ios-game-hack In PDF document text
    • https://zszolesno.pl/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://zszolesno.pl/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://zszolesno.pl/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://zszolesno.pl/images/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • https://zszolesno.pl/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B5 25160 bytes
SHA-256: 9da3edcea783b436564ff80d4bfc5f07e2d24a6996a36ad9c4a24e007c0af26e
font_01_sfnt_off00006c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5B 3136 bytes
SHA-256: 9d28ceb016570938ba7d2b7c097f413a04737dfc2fe28b57753b8b0e16570a9c
font_02_sfnt_off0000771a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771A 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000812b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x812B 18292 bytes
SHA-256: 6bfa7f6d06191d232a4e1dc6d24987c59b1603f32861b15c5e4613e2ba4a1bec

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