Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f29c39f5a1990b…

MALICIOUS

PDF

70.8 KB Created: 2021-06-07 20:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2871ed7c10d60fa923484f60ccf40eb SHA-1: 80ac53cad7aa7d97b45a5475f6173190cb324700 SHA-256: b7f29c39f5a1990b52b2f680a182c8026465b958ef12e4d515ab265b860df731
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that directs users to a page discussing how to change Hikvision IP camera passwords. This URL, combined with the ClamAV detection of 'Pdf.Phishing.Trojan', strongly suggests a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the ML classifier and ClamAV detection indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://krisoc.ru/pbw?utm_term=how+to+change+hikvision+ip+camera+password
    • https://static.s123-cdn-static.com/uploads/4389361/normal_5ffe5a0037982.pdf
    • https://cdn-cms.f-static.net/uploads/4388420/normal_601cfde68c4f7.pdf
    • https://static.s123-cdn-static.com/uploads/4411714/normal_5fd05f2cc70ac.pdf
    • https://cdn-cms.f-static.net/uploads/4479942/normal_604830553ee7e.pdf
    • https://static.s123-cdn-static.com/uploads/4412909/normal_5feb5cd6efc7d.pdf
    • https://cdn-cms.f-static.net/uploads/4414852/normal_601ab08b05c93.pdf
    • https://cdn-cms.f-static.net/uploads/4405179/normal_600d38ccae07a.pdf
    • https://cdn-cms.f-static.net/uploads/4393353/normal_60290a3f0797c.pdf
    • https://cdn-cms.f-static.net/uploads/4473926/normal_6014b99022998.pdf
    • https://static.s123-cdn-static.com/uploads/4367013/normal_5ff31bc777627.pdf
    • https://cdn-cms.f-static.net/uploads/4417216/normal_600dcfcd70913.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://duriwug.pbworks.com/f/popinesasexawur.pdf
    • https://uploads.strikinglycdn.com/files/3f503507-788d-4295-9e43-51892b41bee1/remepelafabe.pdf
    • https://uploads.strikinglycdn.com/files/3b5bc667-6463-479c-94a2-8eb1c38ed9e3/pizawevariredime.pdf
    • https://uploads.strikinglycdn.com/files/16aac2cf-2009-4aae-a94a-d1e455ab3aa7/food_combining_chart_for_gerd.pdf
    • https://uploads.strikinglycdn.com/files/ff256aa2-8536-4500-9115-0e72735d73f1/54294149653.pdf
    • https://uploads.strikinglycdn.com/files/dc451f64-eedc-4cee-a004-7d26d797d2fd/html_css_link_button_style.pdf
    • https://uploads.strikinglycdn.com/files/cef7feb9-73c9-4bbe-8099-5b21ca3f7c4b/weber_spirit_ii_e-210_lp_gas_grill.pdf
    • https://uploads.strikinglycdn.com/files/2dddefed-33c3-4193-b7ad-adf6d5f745df/58350712507.pdf
    • http://wixugigir.pbworks.com/w/file/fetch/144594081/adobe_acrobat_7.0_professional_full_version_free_download_with_crack.pdf
    • https://uploads.strikinglycdn.com/files/fc797c6d-a913-4ec1-9972-2b60d6636de3/what_are_the_differences_between_legal_and_ethical_issues_in_psychological_testing.pdf
    • https://uploads.strikinglycdn.com/files/035e4b8e-7c2f-4341-bb9a-e3a7fbc98b9e/dog_man_movie_pilkey.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_off0000d606.bin
93fd10ec86131bbbdcf58935e435c7d04f720c065bd8719e023579857638036f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD606 5632 bytes
font_01_sfnt_off0000e91b.bin
95e03d3552a4f6161a4abf14f1dbab2dc03f3da00fbc99770570954635b47c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 10632 bytes

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