Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa0415bed161c42…

MALICIOUS

PDF

37.4 KB Created: 2021-05-21 01:38:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6a39c9c09db56b1e8dbb37ad3961a191 SHA-1: 7d013575cc54e154df5715a01e79da6dffbe8983 SHA-256: 8aa0415bed161c42d6d94c54c2b3584f015cc3154ce997e6cf12564ea896ee6d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious files, masquerading as game hacks and generators. The 'ML_NYX_PDF_MALICIOUS' heuristic and the presence of known malicious redirector infrastructure strongly indicate malicious intent. While no scripts were directly extracted, the document's structure and embedded links suggest it is designed to trick users into navigating to harmful sites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/roblox-phantom-forces-hack-game-hack In PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-get-free-stuff-on-roblox_GM431946152.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_off000033a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33A2 25528 bytes
SHA-256: 8127db2c3dc24a157f9d669ef4951acb3f24c5243b7150f975a5725ddfc802d5
font_01_sfnt_off00006eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEF 19028 bytes
SHA-256: a1c2896b7dc960917d06e8f54c838956c7eaad0f88986fe011a2bb83a0b16557

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