Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee75bbc31c4e1745…

MALICIOUS

PDF

79.6 KB Created: 2021-04-01 15:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f8b19d326dff5d714c08d7beef40f1ac SHA-1: 3f31d98e7f5df1772a792505fe97d1cdc37776f3 SHA-256: ee75bbc31c4e1745ce0659ece2cc3430fee3a9effc0b88ff9dbd7852a9c840af
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a malicious intent to obscure the true destination or spread. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content.

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://mezovuduw.ru/award?keyword=basic+formulas+of+excel+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498997/normal_6003089f403b9.pdfIn PDF document text
    • http://casser.xyz/93730948149q30aj.pdfIn PDF document text
    • http://myirn.icu/muwupelelikewabekapaczcfi.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/fjiRify/52184858287.pdfIn PDF document text
    • http://qwertyujg.xyz/best_virtual_phone_system_for_small_business_ukzehyi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455196/normal_60481dad543be.pdfIn PDF document text
    • http://gijutudubesakuz.iblogger.org/cervical_disc_herniation_treatment_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/ThcNzdD/suwez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385030/normal_6012625322b78.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/yghHs5s/42474565098.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/jiejdk5/hair_braiding_salons_in_west_columbia_sc.pdfIn PDF document text
    • http://antonioit.fun/sylvania_bluetooth_speaker_sp483_manual6fxs2.pdfIn PDF document text
    • http://glasshookahcatering.com/mawanewerufaop5l4.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/il2K2Fa/canon_camera_connect_for_windows_10_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419424/normal_5fcbbf15c231c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_3c4464c64f5e47baadec306e3f17783d.pdf?index=trueIn PDF document text
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_d5c9facfa6d249068f522af40c3b4644.pdf?index=trueIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_e3f599b2d71a4fb1911ff54e677fecf0.pdf?index=trueIn PDF document text
    • http://fejusudoboriduf.rf.gd/fitt_guidelines_for_cardiorespiratory_fitness.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/peter_van_houten_an_imperial_affliction_book.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/python_extract_data_from_excel_sheet.pdfIn PDF document text
    • https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_5e66bc2131db42108fdcb47bc7c090d3.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_off0000f825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF825 5420 bytes
SHA-256: a8eea489f10eef22a7ec828c027b305c9e8bea8604fa80d805d9b623f75115c7
font_01_sfnt_off00010a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A80 11448 bytes
SHA-256: 2ac9ba8b998e445e71fa6223935456d06281c5792ec4bde80772cebcf54d4791

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