Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a0868beec85a55…

MALICIOUS

PDF

77.4 KB Created: 2021-05-08 15:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e426aedf78308f9cd903179e55c2dd1e SHA-1: 57414ebb7a620e53e5bb0751449aad9786a8d574 SHA-256: 89a0868beec85a55aa340420b3099c0f33b21a13daebec7b659a27ff1bf03ab2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one prominent URL pointing to a disposable hosting domain, suggesting a lure to a malicious site. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct the user to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=computer+science+an+overview+av+brookshear+j+glenn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4506159/normal_605708cf3ee50.pdfIn PDF document text
    • http://fijeveg.iblogger.org/sports_vocabulary_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489983/normal_60257c276bb7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_605f31169b6c5.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/minobosifozugatologidofap.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/xajemulakugojetimizige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_602f08b082e18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421776/normal_601de7bd4419c.pdfIn PDF document text
    • http://bejozenofidon.22web.org/volume_of_cubes_ks2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_60623dc250809.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479470/normal_5fc7452322318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_604b7c65b42d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427504/normal_5fedc3672e71a.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/cryptocurrency_adalah.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faleferesevo.onlinewebshop.net/assembler_plusieurs_en_1_avec_adobe_reader.pdfIn PDF document text
    • http://bemedaxo.rf.gd/advanced_excel_full_course.pdfIn PDF document text
    • http://xipobibupo.epizy.com/data_structure_interview_questions_and_answers_for_experienced_in_java.pdfIn PDF document text
    • http://dapukagizepor.rf.gd/allan_kardec_book_of_spirits.pdfIn PDF document text
    • http://wivufakumetewiv.rf.gd/91752356327.pdfIn PDF document text
    • http://wiroweri.rf.gd/how_to_reset_vista_20p.pdfIn PDF document text
    • http://potimafekun.epizy.com/19th_amendment_to_the_constitution_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/004da31c-5a2e-4dfd-9d47-0939f726e30f/is_flipping_property_profitable_uk.pdfIn PDF document text
    • http://kikukuvikato.myartsonline.com/83615520933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd3a16b-50a5-4091-8ac9-753216aae5ae/sig_sauer_p229_vs_p320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e9af12-7089-4055-bd6d-e372bd379297/sony_xplod_800_watt_amp_price.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_off0000ed3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3B 5684 bytes
SHA-256: be1621147d6782aab4a081f6fc4d4bdfff85d8197e2ab7d7d4acc770a6366cd2
font_01_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 11364 bytes
SHA-256: 899a25df13e34494c745ed358a7e37ab9664ce8b0f1a4296942a70b7140641f8

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