Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee586b7b1f4b2f31…

MALICIOUS

PDF

79.5 KB Created: 2021-04-25 00:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e3e8305fd9afc32da268edaaabcb7300 SHA-1: 2849e1ef91273d33441fcdb70f4dd2750180b784 SHA-256: ee586b7b1f4b2f314ea627dd9ad66b6b22ee0171ede09bd3083590be4f53bca5
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, with one specifically identified as a malicious link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript, though not fully analyzed, suggests an attempt to execute malicious code within the PDF.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/strik?utm_term=how+to+close+income+summary+in+partnership PDF link annotation
    • http://pesale.pro/full_form_of_cid_and_cbi2jvhe.pdfIn PDF document text
    • http://gevilubim.iblogger.org/bixesikemixir.pdfIn PDF document text
    • http://sneakerspapa.store/15017767286pfgks.pdfIn PDF document text
    • http://fruktovik.com/wozasakozoginubmpum.pdfIn PDF document text
    • http://lidlid.xyz/american_academy_of_endocrinology_diabetes_guidelinesre0v5.pdfIn PDF document text
    • http://gratoram.site/document_retention_policy_template_2018pj5o3.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/rii_mini_i8_not_pairingvl3ph.pdfIn PDF document text
    • http://rollernefrit.xyz/9749832796mtgrr.pdfIn PDF document text
    • http://iciko.xyz/tavoguvorasufugejubixeli2hifi.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/caa0f676-abcc-426f-9291-7b5c07c4b2b4/mtd_riding_lawn_mower_carburetor_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/asterisk_war_op.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c7c5b5-3bfa-4ba4-a322-004138f56521/sasuzujum.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/dvt_guideline_esc_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f3e7b2-9803-4f70-9f78-01c41a81eb75/hp_stream_11_cpu_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/charlie_puth_songs_mp4.pdfIn PDF document text
    • http://rojapaj.epizy.com/xarofudidokulewutufikedar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1628058-de57-454e-963b-c1f54ef47e32/92625045890.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/76305435040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39289700-44e1-4de8-8623-ebbd9520d0d6/60883221250.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/iso_9001_version_2015_english_free_download.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_off0000f97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97A 5328 bytes
SHA-256: 6aeb296f49390ca3b445b6c95c27078249336ebba60b82067f09b98bf0964f81
font_01_sfnt_off00010b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 10704 bytes
SHA-256: f6239ef9f0a70842130193f12d9fa9f1eb4ed562776b0bd1948347fd897aaf0e

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