Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f2bfda50a8b35d…

MALICIOUS

PDF

74.8 KB Created: 2021-01-21 11:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7258957e34c693190ea18c21eae5b0bf SHA-1: 2fceffd1655a0aac1bdf639f309b648191592257 SHA-256: 71f2bfda50a8b35dbfae4df34e908a3aa4df51924f7b85dc49a91da113c5195c
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/aws?utm_term=camscanner+app+free+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449968/normal_5fc9dde87536f.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/ujdiUhe/ionity_charging_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/dabigewom/hgKgcIG/archery_store_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5ff5f122b46c2.pdfIn PDF document text
    • https://cdn.sqhk.co/rujosupatebu/atie1T0/gizesejisoledirajizu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451954/normal_5ff085a9366e2.pdfIn PDF document text
    • https://site-1239625.mozfiles.com/files/1239625/komosarelujexakoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475570/normal_5fb27d1d437fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391620/normal_5fe03a92a766f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474478/normal_5feaf27febf70.pdfIn PDF document text
    • https://site-1251917.mozfiles.com/files/1251917/vawovaxenugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5fdc0dc12cf84.pdfIn PDF document text
    • https://site-1245341.mozfiles.com/files/1245341/adguard_premium_apk_3__2__97.pdfIn PDF document text
    • https://site-1175273.mozfiles.com/files/1175273/zedadusejuxip.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/lopadivupudexa/23306862772.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/carillionamey_furniture_return_form.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/present_value_table_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/metitavularojazuliv.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/minority_report_phim.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_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 5172 bytes
SHA-256: 41ae475aa79542a6dd68dda79510f3251d1a7ea9de9e3cab22819833f0f56cd9
font_01_sfnt_off0000f960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF960 10852 bytes
SHA-256: 86d8a47c35dbdb14ab6efe78fcc0e8d01f96ed075f08cd9c0d054cf6b5d25681

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