Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9d3dd0c12b1f39…

MALICIOUS

PDF

78.1 KB Created: 2021-05-16 20:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4524531f6f4d262f8d20db60202f8b12 SHA-1: e8e20c903e8dcbfa80f685f1362c88a57e6e25f5 SHA-256: ec9d3dd0c12b1f39fd6139149efa664356404e3d6f13ebf2da5493b2275f2948
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded links, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference a trailer song, likely as a lure. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to malicious sites.

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://ponafet.ru/strik?utm_term=the+secret+dare+to+dream+trailer+song PDF link annotation
    • http://kesisofawa.mygamesonline.org/lupizuwojobesanigazulula.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/4236039.pdfIn PDF document text
    • http://bipowilago.mywebcommunity.org/lapukufejokij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366630/normal_5fc867c354f09.pdfIn PDF document text
    • https://wozomeki.weebly.com/uploads/1/3/0/7/130776066/sagipab.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/4903429.pdfIn PDF document text
    • https://xotizirew.weebly.com/uploads/1/3/1/8/131855992/fitimigib_torumomuvuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477916/normal_5ffad04a72e8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406170/normal_5feb2512737cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_602e46dd54477.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/d8f85c17-3864-466f-b70d-b49822eed524/74358535409.pdfIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_fe7c93814f64461eaf0ec139c8c3c7e6.pdf?index=trueIn PDF document text
    • http://ligiwekuxote.myartsonline.com/42626054540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f22114a-80b0-4a28-9474-14cbbcf595ee/tegez.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/hp_z420_workstation_quickspecs.pdfIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_1aa2b1e022704ecbaf834e825f675d8d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/humminbird_597ci_hd_manual_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/how_does_book_defending_jacob_end.pdfIn PDF document text
    • http://dopovis.myartsonline.com/kujapatofubowekow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c1359d-2b82-4131-a347-eb1a682a44ce/59239191777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb78bf81-5d0e-4205-9675-0802a9533caa/64920437151.pdfIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_6e33b591d34c4af095d031e7f210361f.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_off0000f272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF272 5300 bytes
SHA-256: 2151287325abd2f8e6940d8f7776569f67e1618a9e3a07070a13b7b0864f8046
font_01_sfnt_off0001044e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044E 11296 bytes
SHA-256: 94c36520b6df063f0b03d421b1c671c35b6945318d4c10aa54712141f858b650