Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ad0e5201ea4c35…

MALICIOUS

PDF

84.5 KB Created: 2021-05-25 11:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ce0ac8661929d662af36b9a3658913a8 SHA-1: 68410e6adb50365e06623fd55aa8f1e84834bea8 SHA-256: 90ad0e5201ea4c35603ecc6de1bf9f3c90189f976442e90daec229fa72156ae2
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. The embedded URL points to a site that appears to be a phishing lure, specifically requesting activation of Flash Player, which is a common social engineering tactic. The PDF structure and content suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ponafet.ru/strik?utm_term=how+to+activate+flash+player+google+chrome PDF link annotation
    • https://dugizixenopiloj.weebly.com/uploads/1/3/4/4/134457585/4035792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503791/normal_5fd641d334852.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/6985122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_60622f052a494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_60208c49550fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_602e77a9e7caa.pdfIn PDF document text
    • https://jilazokezabise.weebly.com/uploads/1/3/5/2/135296918/dexebuma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc24c3f7-6eb7-4ca8-b21a-abcfd83d1a37/nijorumonaroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa3da6e-b104-4423-a737-e53279d68803/wiketavim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3cdf39a-4f9e-41f2-aa0b-9424dfb7479c/busifowifuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46964f01-9bc3-4de8-afe5-ea89ed3cd329/73450192913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6347502f-bfc1-4cbd-bb88-5961e41b5235/59728134339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155ec72e-5cdd-4652-abda-a31fee40c98a/liars_dice_simple_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc155ad-8c6d-4d02-9ead-8015ad2f90a6/37493419095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb85b8b-65a7-4005-8ec6-8c4d4a1e7efa/50795402244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc4817d-b60c-436c-8554-6900b0d71cfb/what_does_the_word_moultrie_means.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e48157-7eff-4554-bb79-a411876a22aa/refisinadenozawo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36B 5644 bytes
SHA-256: aa6389eca6a2038cf784862e5aa4e2081aca7f6b3235af5039742620f988155d
font_01_sfnt_off00010698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 11004 bytes
SHA-256: dbfc7c3285f0b9bd4c2fd57bce886d3831423646cd33c859d5f89889d7b2838a
font_02_sfnt_off00012c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C54 16492 bytes
SHA-256: 03275968b19c3cf80b233fda4c941d1fb59be07a2e9444009632dc919eedb138

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