Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec74eb8f92d19b4e…

MALICIOUS

PDF

47.0 KB Created: 2021-06-13 23:49:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 07456d08a96eca4360461003cabf89b2 SHA-1: 564a2646f9eea532466bfbb8da265c8fa2d57991 SHA-256: ec74eb8f92d19b4e1a83cd24e78cf94b60c89e3537a0563de68bd6063514a10c
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 structured to appear as downloads for game hacks and cheats. The ML classifier and the PDF link farm heuristic strongly indicate malicious intent. The presence of a 'download button' lure further supports the social engineering aspect of this attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/apex-adventure-roblox-hack-game-hack PDF link annotation
    • http://nalmpantistractors.gr/images/roblox-one-piece-golden-age-hack_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/hack-para-roblox-de-robux_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/how-to-get-free-unlimited-robux_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_off00005326.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5326 28232 bytes
SHA-256: 9537dc1521eda38140c4a1d357a4f6267ed3faf91f1dbbee68f0ed27a58e0f4a
font_01_sfnt_off0000939d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x939D 18888 bytes
SHA-256: 2a67d1b3779309af9252df1e32c065bfa24916d1f85f7a5e583d8d8cb8eb7f22

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