Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0725cc0911e1feb…

MALICIOUS

PDF

69.6 KB Created: 2020-12-29 14:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 39b9ea61b21d5fbac1a0a1fa8176f5f6 SHA-1: 076753942a7f36c31cea7e3374cc67b76f0ca719 SHA-256: a0725cc0911e1feb42154d52cffba5fe0a5e040091be9de9cb8a85a4edf5acbd
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, a common tactic for SEO poisoning and phishing. The primary malicious URL, 'https://traffnew.ru/strik?utm_term=asteroids+deluxe+arcade+game+for+sale', is likely used to redirect users to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffnew.ru/strik?utm_term=asteroids+deluxe+arcade+game+for+sale PDF link annotation
    • https://povisegidugukab.weebly.com/uploads/1/3/1/8/131871963/d88bbed.pdfIn PDF document text
    • https://cdn.sqhk.co/talidapato/chdBjdK/rusarijajuxulima.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fceff74b51e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464311/normal_5fe36048dae88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5fbb0060d2d47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f8f4bac0ef84.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/saxefi/giving_tuesday_email_templates_mailchimp.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/hire_purchase_questions_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc378934-dc2c-4bc5-8bb5-7b017130b18a/problemas_de_decimales_cuarto_de_pri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c495455d-40ff-48f3-8a3a-ea5743519783/comment_crer_un_fichier_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3961b3f-f141-456f-8de5-6d9a194b1ddf/new_years_eve_party_raleigh_nc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0529e96-ab05-46e4-a49c-18d667a3101a/pygame_draw_line.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_off0000d114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD114 5400 bytes
SHA-256: fffea7402a351144e38d673750e258db2f756287d425107f006de5440624d45a
font_01_sfnt_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 11288 bytes
SHA-256: 9570eed64af92d5a5f3a5bc5c260301386cd62e8a7ef69c282e888e3b9ab706c

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