Malicious PDF — malware analysis report

Static analysis result for SHA-256 6874f0d3b2a99d7c…

MALICIOUS

PDF

119.7 KB Created: 2021-03-22 10:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c2f63202ec29886c463c969b7bfc9361 SHA-1: 6bee8a0b9e96f491128585b2c7048c4ce22f5671 SHA-256: 6874f0d3b2a99d7c0510f5d16e59d773f0c65c4b22a8175478fa014852ed6d23
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the URL and potentially the search term used to find the document, indicating a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://kuzutuzo.ru/strik?utm_term=2013+dodge+charger+interior+trim PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382414/normal_6054db9918e24.pdfIn PDF document text
    • http://mipefukonuvav.iblogger.org/28259638451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_60547cb596e33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_60435d6fc17db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_601733da1bcd8.pdfIn PDF document text
    • http://xomaweluk.22web.org/garand_serial_number_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_601147016acbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/balance_scale_activity_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/emulator_gameboy_advance_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/alone_together_book_covid.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/73002765517.pdfIn PDF document text
    • http://zesirina.rf.gd/argumentative_essays_samples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6861f346-3707-4a5f-a7f6-8e538f02feff/54996855213.pdfIn PDF document text
    • http://nepopenezum.rf.gd/xray_mod_for_minecraft_pe_android.pdfIn PDF document text
    • http://xalesikejuxo.epizy.com/sensory_integration_and_the_child.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c110e716-56b2-48f4-8201-502a84870afe/59510408306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9783c5-a1e4-4dce-a571-011b1163cd01/kitchenaid_double_oven_stove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa77dad-ed66-4f17-a274-0668a4001b47/52069763935.pdfIn PDF document text
    • http://filamejukak.epizy.com/html5_ecommerce_website_templates_themeforest.pdfIn PDF document text
    • http://modunup.rf.gd/aviva_drawdown_pension_fund_performance.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001985e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1985E 5540 bytes
SHA-256: 087f173fe87f7281d618c3df31834efb1ee8fc0deeb81ecd6f94c456854a64b0
font_01_sfnt_off0001ab0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB0D 11264 bytes
SHA-256: 0e6161a5a2e73b7680b8b219848cccd0937b6201631b61b4d0ed8fd44c21e0ec

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