Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57179031b3b0978…

MALICIOUS

PDF

62.3 KB Created: 2021-03-02 18:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b6fa2fd21984d3d4326c0e873f5a924b SHA-1: c5f2d0b4b26e88179f99aa7e79410512e25f10ec SHA-256: f57179031b3b0978915b5e2e097c8ac84c5a6148445d9000fe64d653b7b93690
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 4

  • 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
  • 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://jumiwimov.ru/award?keyword=topics+in+algebra+2nd+edition+herstein+solutions PDF link annotation
    • https://duzetokip.weebly.com/uploads/1/3/4/4/134404829/b778cadb21b53.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/how_to_use_a_diffuser_and_essential_oils.pdfIn PDF document text
    • https://juduloto.weebly.com/uploads/1/3/5/3/135323899/6cf62be2cee2194.pdfIn PDF document text
    • http://katowad.22web.org/excel_worksheet_name_from_cell_value.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/36908046179.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454054/normal_60097e22aa61a.pdfIn PDF document text
    • http://memimusisat.getenjoyment.net/14839036084.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/jugejazenufew.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/botigamimepeg.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/9df99ca641840.pdfIn PDF document text
    • https://puvawenoma.weebly.com/uploads/1/3/3/9/133999826/kobasugabul.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/padanivozeb/nfl_2015_schedule_week_2_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/the_funeral_trumpet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/nitrogen_cycle_worksheet.pdfIn PDF document text
    • http://dixisafujanen.rf.gd/saxovonipuzitajatanuwokon.pdfIn PDF document text
    • http://gexazavere.epizy.com/winkawaks_emulator_1._63.pdfIn PDF document text
    • http://torumotone.rf.gd/daily_grammar_practice.pdfIn 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_off0000c8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DC 5556 bytes
SHA-256: 2a7ad4ed43a825303db27ff951a67a3ce2cf482d484f9923fa3c7ac9a97c1718
font_01_sfnt_off0000dbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAD 10368 bytes
SHA-256: 26e2ce1ebe9f1c8f9456fd99340d49d1b5d2b5771d2b2fb9591229ee1c71c123