Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea4fa40c64077d8…

MALICIOUS

PDF

109.4 KB Created: 2020-12-22 23:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4cfd2ed9ee10ce7371acbe3b7dcec03d SHA-1: 59772f1d5b77119d308889b4e5380aedcc8acbac SHA-256: 5ea4fa40c64077d8f0b9daea30259b4726a9256c158eece89da21967a4261cea
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm, with the primary malicious URL being https://trafficel.ru/123?utm_term=ironic+events+in+act+3+of+the+crucible. This suggests the document's purpose is to direct users to potentially malicious websites for further exploitation or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=ironic+events+in+act+3+of+the+crucible PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5f9578b349b36.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/xosobaku_wujunawik_tokeberu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zupenafud/map_of_paris_arrondissements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372a8f7b-6744-4319-9770-a1b103499ada/66175660586.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/lixatexe.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/impostazioni_account_alice_mail_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f030a97-d2cc-4e64-a1f7-41036d8a2e07/naruto_and_tsunade_fanfiction.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/76906934033.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/clinics_in_dermatology_author_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6e8359-a2ff-428c-9ead-c6cd168ad1f3/label_the_skin_diagram_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/jivobizeraxowoba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16691 5152 bytes
SHA-256: 83db4aaa374c5cba846a1655a63a9324a90997b0127e472e739755d55cc3fdf2
font_01_sfnt_off00017808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17808 10180 bytes
SHA-256: 01e470fed55c1dac0e1c4234df1b380ee1d869af5e88c1be7de1ee06161abf9e
font_02_sfnt_off00019a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A54 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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