Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e164c4518d646b…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 22:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 78b084a2d5a45d5796108f4bda0cdc98 SHA-1: 59b4fe6fc5666b6a2c6a8a2877106ecec39b41da SHA-256: b1e164c4518d646b0fd71e1ba383c9c48085fec61ab215425a21771e809ada1b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which appear to be SEO-optimized for game-related cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially harmful content or download further payloads. The document body, though partially corrupted, contains references to 'free spin' and 'coin master', aligning with the link farm's theme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/406889139/free-spin-coin-master-2021-link-game-hack PDF link annotation
    • http://spentulib.com/search//repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/minecraft-auto-miner-hack_GM479516143.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_003_off00004c20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C20 24252 bytes
SHA-256: f445e7e8ede3ed20556f3b8f668cb335b0de87ebc849b289acde7ed8846ce64c
font_01_sfnt_off0000834c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834C 18456 bytes
SHA-256: 7500aca679d0fadfbda1e17cf023a195ee80a601fef81e7f7ced8cf50182af56

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