Malicious PDF — malware analysis report

Static analysis result for SHA-256 23619d8011733af9…

MALICIOUS

PDF

81.2 KB Created: 2021-04-30 20:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7139ae60e226cf7a153a0a0d3726c313 SHA-1: c50c40738f421cdee9a86272701599cf16bd9565 SHA-256: 23619d8011733af92c6e4ee600e703dc6fbbf31eb95f14fc91016899c96bb0f2
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit user curiosity about technical issues to drive traffic to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=why+is+my+sound+bar+out+of+sync+with+my+tv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501028/normal_5ff34ddd7603c.pdfIn PDF document text
    • http://bestunew.xyz/how_to_fill_a_conair_steamer2lm0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496001/normal_602c03cdab61d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_605b639ba83ec.pdfIn PDF document text
    • http://boothattendant.com/71799568113p5y05.pdfIn PDF document text
    • http://ig-copyrightnotice.com/the_prince_and_me_3_full_movie_free_onlinelf1um.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/kokilaben_dhirubhai_ambani_hospital_reports_portal5r20c.pdfIn PDF document text
    • http://toppiksnack.xyz/9410319904wlcs6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_606d5420569f4.pdfIn PDF document text
    • http://zexawil.22web.org/archiware_p5_client.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367311/normal_5ffd008a23299.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xopugup/2525920815.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_e103d8727e934b71ba802551a381e8fc.pdf?index=trueIn PDF document text
    • http://gositagopa.rf.gd/guitar_chords_guide_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/workout_log_spreadsheet_excel.pdfIn PDF document text
    • http://wiroxidimov.rf.gd/napevima.pdfIn PDF document text
    • http://lajirobodogew.epizy.com/conceito_de_abordagem_qualitativa.pdfIn PDF document text
    • https://a867a740-3546-49c9-bb92-c76f735cad7e.filesusr.com/ugd/c312ff_de371c6023b3431cafc60894cb0024c9.pdf?index=trueIn PDF document text
    • https://02274cc9-8b57-4441-be19-e46c089ec46b.filesusr.com/ugd/f11b8f_db178b9b7009451e92f56bad3eb2b8bc.pdf?index=trueIn PDF document text
    • http://perepidowowavam.epizy.com/stop_questionnaire_sleep_apnea.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_8f58a2229e27448cbe96cd9f6134b08d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusori/brother_hl_5450dn_printer.pdfIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_474c387f5a58404eb2c67c2e5851d6e9.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_off0000ff06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 5636 bytes
SHA-256: 8898f47618e1fda6c1fdb2a6d4e765a0f91320fbd53ce47b2181b065ee522bf2
font_01_sfnt_off00011228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11228 10732 bytes
SHA-256: 06eb928f8feb67e9a99afe14c4793a44185ab955009b8908415d2e8c4cfeb4f7

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