Malicious PDF — malware analysis report

Static analysis result for SHA-256 175789867cddd4ed…

MALICIOUS

PDF

94.6 KB Created: 2021-04-08 03:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 35fcd19e89abc4b08455d26438665809 SHA-1: 7ad813479c7ab102553c0952200c563a5b2113ef SHA-256: 175789867cddd4ed32c3ed8c1250f0592ff4853b8b903870d264feeffb0d2f87
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a search query, indicating a potential lure.

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://midufefew.ru/strik?utm_term=how+to+use+panasonic+dimension+4+microwave PDF link annotation
    • http://lafowesezojo.scienceontheweb.net/36123318162.pdfIn PDF document text
    • http://vutazumadik.iblogger.org/timukikekadewuvubuxo.pdfIn PDF document text
    • http://godezigupo.mywebcommunity.org/biblia_reina_valera_2020.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/lafunasisux.pdfIn PDF document text
    • http://lesifipi.22web.org/national_geographic_traveler_magazine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noxewun.rf.gd/64231695482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8acff30c-637b-4933-ab85-9dffae3283fc/7678721680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d66bee-4cae-4f6b-b69e-d9948c0edd5c/sauder_storage_cabinet_assembly_instructions.pdfIn PDF document text
    • https://94e55d9a-ad7c-4b6b-a54a-a00202ad3087.filesusr.com/ugd/208fd7_24a520a09f994a968876cdfb44b74b03.pdf?index=trueIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_e1899cc77d964d7fb4234e37b6254a0a.pdf?index=trueIn PDF document text
    • http://zewilamijalu.rf.gd/writing_objectives_using_bloom_s_taxonomy.pdfIn PDF document text
    • http://gikutixutawax.epizy.com/etiologi_angina_pektoris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7743ea23-9e51-4360-bcf6-89dbcdce3597/electronic_devices_and_circuit_theory_10th_edition_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d05f1e80-9cb3-4f40-acae-32ee1700d9ef/how_many_copies_of_harry_potter_were_sold_in_the_first_year.pdfIn PDF document text
    • http://ranokevizo.rf.gd/how_to_learn_tattooing_at_home.pdfIn PDF document text
    • http://rexerutagid.epizy.com/operating_system_for_gaming_pc_reddit.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_d8f000da35d34d2f8846d15315a5ec41.pdf?index=trueIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_474630663e144ddb9eb9de447448eff2.pdf?index=trueIn PDF document text
    • http://mimewimirul.rf.gd/47164764763.pdfIn PDF document text
    • http://vutupaxuvidebif.rf.gd/kaposi_sarcoma_treatment_guidelines.pdfIn PDF document text
    • http://sorofakomefus.epizy.com/69694498397.pdfIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_dbdc958e61da47ecb1d6341386ed3e12.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_off00012f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F67 5388 bytes
SHA-256: 32646b1d34000a1d11b24a298f79b6b365252b06b27fa3768be690f422707d15
font_01_sfnt_off000141bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BB 12804 bytes
SHA-256: e82b1ffe83fa200375e39f6c323a4a6dadfc91e342d4d80dffa70d2724d85ef8

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