Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7b37724edffcdc…

MALICIOUS

PDF

76.4 KB Created: 2020-12-16 23:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 63b95761ee38d01e2ceb2bf3787b1985 SHA-1: 6c084eea62a0d917538013d4d9717ecf8cafa535 SHA-256: 4e7b37724edffcdc570ca3af9360b163060f69f6f4a5d5feca3f028dff8f4e40
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', with one prominent URL pointing to 'https://trafffi.ru/strik?utm_term=odesza+in+return+album+cover'. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially harmful content or a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=odesza+in+return+album+cover PDF link annotation
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/4775936.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/4710454.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/bokofapig/nutodoweba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0e36f3de5e49b52ba476/1606290998692/batowaramewixoxon.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/parts_of_a_flower_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5cc51df132613bbdf24a4/t/5fc8393713de6e798152c716/1606957370699/lejuravut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65710085bf90c0e2241e5/t/5fcc05fd33187724c4ddaa4d/1607206402276/high_waisted_button_up_pants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37f742b-7ccb-4bdc-8af5-25b21a77b860/xifuwokikamunufebono.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/10230185933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45eeffc8-f908-40ac-b1b2-b9cbe99e6d45/mibokiguwovupifuwupat.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/15258491206.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce42f2dded0f7041aca232/t/5fd672c613a48350e814bf25/1607889606939/bejumexawetopezepijam.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/lebinalaj.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/zefosi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78550418d7934ac777b2c/t/5fcb59d11ef6d1662fed50a6/1607162321368/n64_emulator_mac_2020.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2D 5624 bytes
SHA-256: 110d112edf0ee296f55575086ffe12803ce01b658295dd4d586e09fad9a7cedd
font_01_sfnt_off0000e28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28A 5364 bytes
SHA-256: 67c8446702dd44a8cfd6193109af15d61355e1fb8eef6fbd424ac0a10bf8a96e
font_02_sfnt_off0000f4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AD 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_03_sfnt_off0000fd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 10808 bytes
SHA-256: 90ff194fe8f891f35ba1c442672f691176872e599012b4c101e93e924bc1dcfe

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