Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf23c229a82a901…

MALICIOUS

PDF

69.0 KB Created: 2020-12-22 01:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4b3d45c134df6b782170c7f5024f092b SHA-1: 73794c18ebc175b68c3b675a553ca60348c15a69 SHA-256: adf23c229a82a9015b9715b4c8ceeecba05407bf8709a261c5778828c2ca4cdc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm for SEO manipulation, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these links, https://trafffe.ru/strik?utm_term=red+long+sleeve+button+down+shirt+women%2527+s, is flagged as unknown reputation and is likely malicious. The ML classifier and ClamAV also strongly indicate maliciousness, with ClamAV identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=red+long+sleeve+button+down+shirt+women%2527+s PDF link annotation
    • https://zepudelewow.weebly.com/uploads/1/3/2/6/132682561/bazedasorax.pdfIn PDF document text
    • https://galebekamabe.weebly.com/uploads/1/3/4/3/134305591/b89b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383792/normal_5fc647ed15785.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/sidigojetupa_moderina_zejirovadebe_dosibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec57acd-6859-48f0-992d-5e90858f7bd0/solid_edge_2020_system_requirements.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf69e3ca23154c95add81/1606219431444/xajunekakopanonidiwupo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64b09f7cf8c75404f74c5/t/5fc822a3094cf7617db4f17a/1606951590557/govif.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6fc0db2e29c7ba9914c52/t/5fd1a47f880fa23343d0cf08/1607574655734/jetpack_joyride_download_hack_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3dd9d5-344f-4ba5-a3bf-4c1c1a945f18/meggs_history_of_graphic_design_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cde0085bf90c0e162532/t/5fd64bd3e5ac5828961f2c44/1607879635575/itemized_hospital_bill_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9bbe50f46d6500014148/t/5fdd0ceb3754d1036a1cf849/1608322284346/frog_hair_fluorocarbon_tippet_100m_guide_spool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0df131-9ed9-4b41-a9d3-627ebc35f9e4/jofasosuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00524e9f-6b15-484b-b5ce-53f6c282da14/telugu_baby_names_with_meaning_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfe8fd743d4425cca11570/t/5fe022792baf317dc3be91ea/1608524410333/free_recorder_sheet_music_for_beginners.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a2525bcb0228a2aa6b09/t/5fd662805b1f6f7539d71864/1607885441255/vocals_loops_free.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_off0000d065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD065 5360 bytes
SHA-256: 98550a4ff9762e0f50225c73ce0c84d179d0359091362a7e913445b1917744b4
font_01_sfnt_off0000e292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE292 10648 bytes
SHA-256: 13b25d7658fbebe89a3105a2d41a51d6bfd88075fdf04a43877ead631bfcf519

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