Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b42f290fbc45c5…

MALICIOUS

PDF

36.3 KB Created: 2021-05-21 20:07:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d165681b4e36573c50c6a3cd69c13ffa SHA-1: 7521d18b4ebc8f575f942723b73eba682329bac2 SHA-256: 19b42f290fbc45c58c7d23c4cd7eb4c261fd7c16ae2afe836c05d6de9b143bfe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to a 'free generator / game hack' lure, indicating a social engineering attack. The ML classifier also flagged the document as malicious. While no scripts were explicitly extracted, the document structure and embedded URLs strongly suggest it's designed to lead users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/431946152/free-robux-today-game-hack In PDF document text
    • https://ambarevleri.com/images/free-robux-com_GM431946152.pdfIn PDF document text
    • https://ambarevleri.com/images/pokemon-go-free-ultra-balls_GM1094591345.pdfIn PDF document text
    • https://ambarevleri.com/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • https://ambarevleri.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ambarevleri.com/images/pokemon-go-free-gift-codes_GM1094591345.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_off000033d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D3 24416 bytes
SHA-256: 91c7aa0b05e5932a3b30b3846b92d4e25c252c6b43e5fedc5315116c506340ba
font_01_sfnt_off00006b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5A 18596 bytes
SHA-256: 123b3c01001442c78a22a4b95c046930f1463c344676a890e106be4cc216f6f4

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