Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49880ce276d12ed…

MALICIOUS

PDF

73.3 KB Created: 2021-04-02 12:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 51808e4252e921b5afb0fbce62efa513 SHA-1: bc0dd6f8dadd051a15866d87780e2c68d7857162 SHA-256: e49880ce276d12edae0766c541dfc09f92ad213d20d734e49770d3e5877ffb9c
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojanized document. The document body, though partially garbled, suggests a lure related to 'working time directive uk opt out form'. It contains numerous external URIs, many hosted on disposable domains, which are likely used to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this file is part of a phishing campaign designed to lead users to compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/123?utm_term=working+time+directive+uk+opt+out+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470979/normal_5ff414e8b86c8.pdfIn PDF document text
    • http://tazedipimazuri.22web.org/anna_wintour_biography.pdfIn PDF document text
    • http://lighttravel-ng.com/27431510008va6o7.pdfIn PDF document text
    • http://mylic.ru/commitment_of_traders_report_for_gold11xr8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_602b7d7d64797.pdfIn PDF document text
    • http://nowtorrentz.com/amar_chitra_katha_bengaliltiii.pdfIn PDF document text
    • http://wepoxagu.22web.org/grade_3_addition_and_subtraction_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457011/normal_60415d24ea4ac.pdfIn PDF document text
    • http://astropsychology.site/65270500173civ08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386834/normal_5fe25a75424e0.pdfIn PDF document text
    • http://poradoit1.site/69639946953tk774.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/0493fd3f-c51d-4f0a-9b00-ebf2fd3c39b0/51116406783.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_aa03bc45cb7a48b1ab32dcaa0995121e.pdf?index=trueIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_15ae74319f124b629eb8ab70e30ea247.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a793761b-35c7-4e54-8fd2-e3fb2b740ea6/32963120546.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/what_is_biggest_religion_in_china.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f0bb805-8534-487c-8931-d914793dc7ed/wokikisagiwunoro.pdfIn PDF document text
    • https://245df057-3761-468b-8bc4-2c9c6734f7c7.filesusr.com/ugd/06c8e1_0e4f860fc1c840deac9458ef6f16c0ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wekibik/control_system_functional_design_specification_template.pdfIn PDF document text
    • http://xolisijepe.rf.gd/automotive_repair_order_template.pdfIn PDF document text
    • http://vuniwetare.rf.gd/18339551433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6795a0-c184-48e0-8377-34374bd5c71e/zupupifojebekibosiwunurux.pdfIn PDF document text
    • https://2bb9e989-9ce9-409f-aa8a-839f2ea8d3bf.filesusr.com/ugd/9f8cc2_e06d9084bb2f400193941ee0716bfdd9.pdf?index=trueIn 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_off0000e29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29A 5192 bytes
SHA-256: 142d3b782a6634b7b76af1154b24ca39a8d6aa482a9b83980bb02199e7fe0c25
font_01_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 10304 bytes
SHA-256: fdc15b2b6d93aab70be7665924f3c3580f609e62a31809b313ad703f6bc6ec16