Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a95e81de37e609…

MALICIOUS

PDF

73.6 KB Created: 2021-03-30 01:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 736448b53d2a891141c88c6b25c028b5 SHA-1: 279f9a5ec88a1657f744fdc028170e3353ca2fa9 SHA-256: d1a95e81de37e60911256cfaee2937cc34580e7e963b1985f17fbd2ebb5d7bc7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and identified as a link farm. The primary malicious URL, 'https://soxebez.ru/award?keyword=amor+liquida+zygmunt+bauman+pdf', is directly associated with the PDF's content and is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/award?keyword=amor+liquida+zygmunt+bauman+pdf PDF link annotation
    • http://toguvuveleguna.22web.org/pimune.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/6iiNgcT/portal_turret_soundboard.pdfIn PDF document text
    • https://sarerudaguf.weebly.com/uploads/1/3/4/3/134373173/gilad.pdfIn PDF document text
    • https://tirilume.weebly.com/uploads/1/3/4/8/134886795/a42258308310a.pdfIn PDF document text
    • https://wimukesogizat.weebly.com/uploads/1/3/4/6/134639197/nulatofogotuloj.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/0e2bfefb5dfcfa.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/4QE7eqQ/95955949682.pdfIn PDF document text
    • https://xizavuxovom.weebly.com/uploads/1/3/3/9/133986710/459317.pdfIn PDF document text
    • http://molosorew.iblogger.org/67402641825.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/ninasivol/1436461319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66315886-fdaa-4438-8102-8bd5e1f4f34a/finogolesotexaba.pdfIn PDF document text
    • http://gagemusogigubew.epizy.com/risk_legacy_rules.pdfIn PDF document text
    • http://jiresigotapikeb.rf.gd/modern_calligraphy_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/apfelkuchen_mit_apfelmus_springform.pdfIn PDF document text
    • http://pebuvow.rf.gd/invoice_form_template_html.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5fb4c9-0707-4ec1-ac44-f33d832826e8/15616406231.pdfIn PDF document text
    • http://dafemekadur.epizy.com/sonic_the_hedgehog_golden_retriever.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c51c0a0-984c-4382-9917-254c28e47b52/93279024834.pdfIn PDF document text
    • http://kegiburumimiwin.rf.gd/simple_past_tense_exercises_for_beginners.pdfIn PDF document text
    • http://tuwelifijija.rf.gd/xelojukatemisepu.pdfIn PDF document text
    • http://muwumatenenuli.rf.gd/risk_analysis_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/funny_test_answers_defend_your_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/vulalazafido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d842d290-2a0c-4a91-92ba-834cd04b6e4d/macbeth_act_2_quotes_explained.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_off0000dc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC36 5592 bytes
SHA-256: 6f160d6bad50c2dc0f9562a6003494411ce32bb4299a0df71c9e493b0f626d87
font_01_sfnt_off0000ef2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2C 12688 bytes
SHA-256: 3cdab5f483264dcafdf1041d0bbfd053dcf883e9b961a0dba6e059b76cc40b12

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