Malicious PDF — malware analysis report

Static analysis result for SHA-256 164b236242c3170a…

MALICIOUS

PDF

45.7 KB Created: 2021-06-10 12:36:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4089f7bca016ff19868b6f52b90c6410 SHA-1: 50494b43c9cf1f0cdc3585aa1c66ab40fd9701b3 SHA-256: 164b236242c3170a15aeef091953137342951c2087450468e76b669a8bfc73b2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm designed to drive traffic. The document body and extracted URLs indicate a lure for downloading game hacks, specifically for Roblox. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a download button lure further support a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-protosmasher-free-downlaod-game-hack PDF link annotation
    • https://sanjoseelectricians.net/images/roblox-apocalypse-rising-spawn-hack-2021_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-to-get-bc-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/cheat-engine-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/free-roblox-codes-that-work_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/robux-hack-v6-5-mythical_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/roblox-robux-pastebin-hack_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/roblox-jailbreak-volt-bike-free-other-game_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/roblox-download-free-ios_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-get-a-free-roblox-group_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-to-get-bloxburg-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-to-get-roblox-accessories-for-free_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/roblox-btool-hacks_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-to-get-free-robux-without-tix_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-do-you-finish-getting-free-robux_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/best-free-injector-roblox_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/hot-get-get-unbanned-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/hack-roblox-electrick-state_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/roblox-jailbreak-telport-hack_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/how-to-get-1-million-in-jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sanjoseelectricians.net/images/free-money-hack-roblox-vicholsimlotor_GM431946152.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_off000051b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B2 26216 bytes
SHA-256: 1841eb1559b193816d58477e564cd7976889cb87763e0f8544961350dbeb1b4d
font_01_sfnt_off00008d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D11 19364 bytes
SHA-256: 7ba4e39f95f78ca6b6e29ead4c3610c1cd52b6afedba5b816de82d9f473e0118

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