Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acf5e925b4b6ca9…

MALICIOUS

PDF

87.7 KB Created: 2021-03-23 09:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da3307a225daea73a22fdbbc486c3b2c SHA-1: b7ee2672f36a33755f8f847596b20f2ce06d8fa8 SHA-256: 7acf5e925b4b6ca9403dcddaa99506138d1fa36cfef9cc1be9e78147732af7b9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a malicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=longshore+transport+of+sediment
    • https://static.s123-cdn-static.com/uploads/4494657/normal_5ff6526e7ee3a.pdf
    • http://duxinivodozular.mywebcommunity.org/patitaxilipejuzibulefam.pdf
    • https://cdn.sqhk.co/gitovera/1HU1ibW/takupawibuxunadajofekej.pdf
    • https://cdn-cms.f-static.net/uploads/4485321/normal_6023c85b14af6.pdf
    • https://cdn-cms.f-static.net/uploads/4479212/normal_6022bddb5d0e3.pdf
    • https://cdn.sqhk.co/xawodoze/hgLlU7K/nejojelenafasoginefawadu.pdf
    • https://cdn-cms.f-static.net/uploads/4392660/normal_601052e378b10.pdf
    • https://cdn.sqhk.co/jobiwokojo/0vjhP6z/shooter_arena_mod_apk_unlimited_money_and_gems.pdf
    • https://cdn-cms.f-static.net/uploads/4366359/normal_603d2f01d208c.pdf
    • http://xafopawiki.medianewsonline.com/24270073734.pdf
    • http://dobofozepop.mygamesonline.org/blink_malcolm_gladwell_trke.pdf
    • https://cdn-cms.f-static.net/uploads/4381318/normal_601d919a6bef7.pdf
    • https://static.s123-cdn-static.com/uploads/4445550/normal_5fe42272c12a1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wejajesenopezoj.onlinewebshop.net/civil_engineering_drawing_handbook.pdf
    • https://s3.amazonaws.com/fifomi/auto_repair_invoice_forms.pdf
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_1d1e50853d004429a39b5045b7342c54.pdf?index=true
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_dc42dac62016493ca5748513279f4ff6.pdf?index=true
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_c6be42b231c849eca774a3e3ac25093b.pdf?index=true
    • https://4f7f339c-9ee9-4921-a7ad-794169edd555.filesusr.com/ugd/fea72b_7a87ad760b0a4cea9b94aed150114091.pdf?index=true
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_98683a0c21b9472caf4029eb09fefa12.pdf?index=true
    • https://s3.amazonaws.com/wovedukevikov/what_is_the_major_theme_of_the_play_antigone.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_off000117fc.bin
b49b668795a387e50abdf14b772810b461eb8b801c3e063558e8b7479298778c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117FC 5364 bytes
font_01_sfnt_off00012a19.bin
fb31c4f553e2f60d7816ab3d4f1275366f9fb67f4b14723681e0ec23a9e395af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A19 11736 bytes

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