Malicious PDF — malware analysis report

Static analysis result for SHA-256 647587c64a72b746…

MALICIOUS

PDF

41.9 KB Created: 2021-06-14 00:53:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 774872da37c4bf916283ff343ff7cee2 SHA-1: c4f194f3942191be5169882aaeffb540a44dada0 SHA-256: 647587c64a72b746490862c3b09a89cac7af2f5baee329507671d42437680ac1
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are SEO-optimized pages promising free in-game currency or hacks for popular games like Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the 'SE_DOWNLOAD_BUTTON' heuristic suggests a lure to download content. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of it leading to a malicious download or exploit.

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 http://netcdn.co/app/431946152/robux-hack-code-2021-game-hack PDF link annotation
    • http://zarinnameh.ir/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-website-bloxburg-sign_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-game-glicth_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-hack-on-roblox-rap-battles-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-1-million-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-link-daily-get-free-spins-amp_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_003_off00004785.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4785 24372 bytes
SHA-256: 78a3b1d99f30c882b792160ac589de356607a624b29e86123ca73da6d8468d81
font_01_sfnt_off00007f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5E 18824 bytes
SHA-256: bdc4b78955d326b592b58f8707428774ebd6e9bf79e94c753171d9783eb0a711

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