Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60c3af574c9707d…

MALICIOUS

PDF

79.2 KB Created: 2021-02-15 11:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5d124164d9e46fec984c9df911787f1b SHA-1: 778c4348b5d04b8dd20a219eeac646a0782001ad SHA-256: b60c3af574c9707d670f3fea5f95f4b767713e407e82416d5c6e6d568b9ab878
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 embedded URLs pointing to various domains, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy of using many links on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=how+to+use+the+omega+juicer PDF link annotation
    • http://ductsunlimitedins.com/2018_monthly_calendar_template_google_sheetsjabkg.pdfIn PDF document text
    • http://kamini33.ru/experience_certificate_format_for_electricianoyjr3.pdfIn PDF document text
    • http://beweroxaku.66ghz.com/mivabewufesiduj.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/fizima.pdfIn PDF document text
    • http://zopaxonurur.iblogger.org/rawazukuseze.pdfIn PDF document text
    • https://tuzokoluxalof.weebly.com/uploads/1/3/1/3/131382257/1431176.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488809/normal_5fe4b2af694f8.pdfIn PDF document text
    • http://qiwi-wallet.online/gexosuwozq01a.pdfIn PDF document text
    • https://modevidiwuwos.weebly.com/uploads/1/3/5/3/135318048/temamilizanitoj_debagugixiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_601778dc0ce6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fd67a75861a5.pdfIn PDF document text
    • http://murezisafedamaw.22web.org/lineage_2_classic_dwarf_leveling_guide.pdfIn PDF document text
    • http://sanadewa.iblogger.org/xovopuwuridofem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nifibomagogov.rf.gd/gantz_perfect_answer_free.pdfIn PDF document text
    • http://woxutonugosafer.epizy.com/animasi_gif_ppt.pdfIn PDF document text
    • http://banodinetawapi.rf.gd/advancing_vocabulary_skills_chapter_26_answers.pdfIn PDF document text
    • http://wetafemef.epizy.com/50478320017.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_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 5308 bytes
SHA-256: d35c0bc98b2e9a8ddec8c23fb026036e185bf54ff296502bde4a5b808c2f6a08
font_01_sfnt_off00010b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B24 10868 bytes
SHA-256: 4ab9ddfe6d3417ca6a78830991c8ac78da560370d9d8d62d795c986d33f04a41

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