Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef870e0d2911b68…

MALICIOUS

PDF

82.0 KB Created: 2021-04-22 09:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8bb559903af593dd7e83c50ccc844ec7 SHA-1: 23acf62a6d24bf6fd3062d27b95e59b77f307438 SHA-256: fef870e0d2911b6818c4e3cb119c0691f61da9a372834778f9dea285df776ed9
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution campaign. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user engagement with deceptive content, likely related to product searches.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://baarspo.ru/strik?utm_term=canon+rebel+t5+price+philippines PDF link annotation
    • http://onkoprofi.ru/25267546827pdhu7.pdfIn PDF document text
    • http://wisecreditscore.info/72260337843po64d.pdfIn PDF document text
    • https://sejubapis.weebly.com/uploads/1/3/4/8/134887951/bfe42e2c6423ae.pdfIn PDF document text
    • http://sale20.site/59277148968ajuzg.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/5519724.pdfIn PDF document text
    • http://umdtheatre.ru/square_body_chevy_truckclgu9.pdfIn PDF document text
    • https://nasijominazol.weebly.com/uploads/1/3/4/3/134366940/5786006.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/92213029459.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/76115899826.pdfIn PDF document text
    • http://artistichomesolutions.com/lavojofezuww1ykv.pdfIn PDF document text
    • http://selectgetc.top/laduzotonevezuxikoguron0crg3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_601cf01aa4a3f.pdfIn PDF document text
    • http://fikebek.sportsontheweb.net/lofupuwenazekutejup.pdfIn PDF document text
    • http://babysampler.com/57916907172gc6q4.pdfIn PDF document text
    • https://tamilavijunaw.weebly.com/uploads/1/3/4/5/134506647/wiwinipewarosufugi.pdfIn PDF document text
    • http://christinaanddavid2019.com/rumurosewakinepipevedoxae9hk9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462362/normal_5fffbc5ac9fa8.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/e104afd2-6b4d-4961-85c4-6002b80893a9/4477836416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db9268f-3494-4514-bfd1-1c3394b12d8b/forever_21_canada_warehouse_location.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/pewezodevaxelak.pdfIn PDF document text
    • http://kebenubes.onlinewebshop.net/how_do_you_turn_off_a_viper_car_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1447ce40-76ce-41a1-974c-5b03137c8a0f/wordpress_user_account_management_plugin.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_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 5192 bytes
SHA-256: 238fed37abfc8b75bd18ef547965e48edd558b946bada5d2c6c0eaa8419ee201
font_01_sfnt_off00011195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11195 12484 bytes
SHA-256: 51296ca501befc7b9ff27bbb8f57035c63eab8a8f840438a5f4760e57d358546

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