Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e599bfae7b70626…

MALICIOUS

PDF

33.9 KB Created: 2021-05-30 02:43:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a58d630732c895a98c3b6df046f8fea4 SHA-1: 7389439a4f8cd8dd4548683d738e9f94375bd589 SHA-256: 1e599bfae7b70626c330176d4c5e8e81ddf4447b03d6805c5853d25bd26e030f
210 Risk Score

Malware Insights

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

The PDF document contains multiple high-severity heuristics indicating a social engineering lure. It impersonates Amazon and directs users to a link promising a 'free generator / game hack' for TikTok, which is a known malicious redirector. The document body, though heavily obfuscated, contains references to this lure and the authoring application 'wkhtmltopdf', suggesting it was programmatically generated to host malicious links.

Machine Learning

  • Nyx PDF Classifier clean score 0.0909

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/835599320/free-likes-on-tiktok-game-hack.
  • 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/free-likes-on-tiktok-game-hack In PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/coin-master-hack_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_off00002d75.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D75 24488 bytes
SHA-256: 74cdfa64a4e701fa95ac5a04bf6b440936c347171e0808b1d3ceda05827c23e0
font_01_sfnt_off000065c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C4 17456 bytes
SHA-256: 68a974c9aa3c870eecc965d525ccb957938ff5f02ba9183d05fa54c35671def6

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