Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b41d1026cea85bc…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 21:21:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0a318aaf0fb2eb655ab845e79440b524 SHA-1: 9c7ebad36de4cc8d410a4c95a4e2807207b45fd9 SHA-256: 9b41d1026cea85bcd1a2ed771a27a4162d138467915c34ccd44a5e56ef3a7851
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs pointing to websites offering game hacks and modded applications, such as Coin Master and Roblox. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially harmful software. The document body, though partially corrupted, also contains references to these game hacks and URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/406889139/coin-master-mod-apk-2021-game-hack PDF link annotation
    • https://kojak-group.com/userfiles/files/hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/tiktok-free-fans-cheat_GM835599320.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/is-tiktok-free-to-download_GM835599320.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004d5e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D5E 24396 bytes
SHA-256: 27c369125ffa2c1c092258da241be28421fa39a9f944bf93524bf10cdd2b7850
font_01_sfnt_off000084f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F2 18468 bytes
SHA-256: 3a864882e9e4289fde3385ccd09838686b667c82d90ee6c78e630994fecff89f

Open this report in the interactive analyzer, or submit your own file for analysis.