Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3c6aaed22cf76a…

MALICIOUS

PDF

42.9 KB Created: 2021-05-17 15:27:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87e16417ab4978ed4810c7faeb0db538 SHA-1: d789ae3547fa337061b29b692fea6ed3ab631db8 SHA-256: 9d3c6aaed22cf76acd072533bde86bb044661cb9c44a3a71f9944a9e78208035
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicated maliciousness, and the document body contains a prominent URL associated with game hacks and free spins. This suggests a lure to a malicious website, likely for phishing or malware distribution. Although no scripts were directly extracted, the presence of embedded URLs and the document's content point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-heaven-free-spins-link-game-hack In PDF document text
    • http://killebergsridsport.se/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/www-robux-com_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-pe_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-no-email_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_003_off00004af3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF3 25460 bytes
SHA-256: c3cb5692366a92e7a1082c16fb3d0ad81c700b8cd218f1bf85edb719ef3809a8
font_01_sfnt_off000085b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B6 18168 bytes
SHA-256: 61c553a771cad2049f64e942d03728efad013d4bfea0708bec7d3446f8b125ac

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