Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec4f45a019de96c…

MALICIOUS

PDF

40.8 KB Created: 2021-05-12 15:30:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: df39c2dd939a083168571a663de7af11 SHA-1: 206f1dbc4866a07f177d4a69b44ba5ae851fb5d1 SHA-256: 9ec4f45a019de96cdaa779da93ca59f7184660b874d6b58ceaee878011b0d199
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' content. The document body and embedded links strongly suggest a social engineering lure to trick users into visiting these malicious sites, likely for further malware delivery or phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/406889139/coin-master-free-coins-2021-game-hack In PDF document text
    • http://atrax.hr/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/wurst_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-ios-hack-download_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_003_off000048dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DD 25116 bytes
SHA-256: acdc80a15dd6dc12045c1594d15c93d134cd2740bd0b72cf013c12e8c40c33c6
font_01_sfnt_off00008218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8218 18112 bytes
SHA-256: d3290bf375094f68ca2c73f068de3958d05aa7629a05aa779b6fc584462feea2

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