Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec33ddd1cb7dd471…

MALICIOUS

PDF

87.9 KB Created: 2021-03-21 05:09:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b32458523fd7616ba0dace78cc59a571 SHA-1: 1a89a2544950ce041bfd37481ea8d79459535c86 SHA-256: ec33ddd1cb7dd47189ad5d6f5dba5e69ca64d53c17473afbff3dab8a9068bd5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains numerous external links, with one prominent URL pointing to 'mezovuduw.ru', suggesting a phishing or malicious redirection attempt. The document body, though heavily obfuscated, indicates a lure related to a 'Bowflex owner's manual', aligning with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://mezovuduw.ru/wix?keyword=bowflex+owner%2527s+manual
    • http://cabinetsapp.xyz/kapamopemexosokewewuwfzyg5.pdf
    • https://cdn-cms.f-static.net/uploads/4367275/normal_600d1b271514b.pdf
    • https://cdn-cms.f-static.net/uploads/4463262/normal_5fdc629332e5e.pdf
    • http://gefivinolegaz.22web.org/98812977659.pdf
    • http://viwimewi.22web.org/bridge_to_ielts_intermediate.pdf
    • http://myluckywin.site/vigewibomukonuxodakaysazl.pdf
    • https://cdn-cms.f-static.net/uploads/4426407/normal_5fe8d74709a52.pdf
    • https://static.s123-cdn-static.com/uploads/4382778/normal_5ffa2795ddab1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_a2162513dab4422fa3896f9a7a1250d4.pdf?index=true
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_dd13a9c69c6d40e6932397da02c2d7ee.pdf?index=true
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_92410f8e4f4c44739ccbf4ef3ca931a2.pdf?index=true
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_63622490b6514297a3568f1bfaa61aa8.pdf?index=true
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_7b791978f0724098b9be4e06b6a15cff.pdf?index=true
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_301c9a88bec2499a843634e2955312ce.pdf?index=true
    • https://uploads.strikinglycdn.com/files/498d96db-65f0-4905-ad2f-02a8f450b3e3/why_wont_my_08_dodge_avenger_start.pdf
    • https://uploads.strikinglycdn.com/files/93937ca9-a92e-424e-aa9f-81e74f7cfe96/is_amazon_prime_on_roku_in_canada.pdf
    • https://uploads.strikinglycdn.com/files/2a7ff1dc-4068-4296-8b25-3e0b594c17c7/pillars_of_eternity_ps4_beginners_guide.pdf
    • https://uploads.strikinglycdn.com/files/19f83f7e-f4fe-4a9b-93d7-3a8ddc672e97/27771881703.pdf
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_cbe39634683d46428f8fe2eb3cab23ee.pdf?index=true
    • http://javozajesaretu.epizy.com/96609929622.pdf
    • https://uploads.strikinglycdn.com/files/d70557da-59f2-4aef-8b4e-f443902924a9/68269943457.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119b2.bin
8f5c90ab01f4af1900764b78bee2b8a1f54d64fc26ad005fb77be222965c6317		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119B2 5156 bytes
font_01_sfnt_off00012b42.bin
d57af7bdc0334a91040939b6649d6a8f4e934cca757cfc032e631d0e1d2065f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B42 11472 bytes

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