Malicious PDF — malware analysis report

Static analysis result for SHA-256 95167eadcd9811f5…

MALICIOUS

PDF

111.1 KB Created: 2021-03-27 20:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97754345dd70cb0ea2a9e7576e8ac896 SHA-1: 2ef85622954c204152be64faaaeab9f03b5ca143 SHA-256: 95167eadcd9811f50b71c1874838c930bb6070fccdeed4db45f3c11fe7be1017
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a URL disguised as a search result. ClamAV and an ML classifier flagged this PDF as malicious, indicating it's likely a phishing lure. The document body, though heavily obfuscated, contains text related to 'utilitarianism' and the wkhtmltopdf tool, suggesting a social engineering pretext to drive users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=what+are+the+examples+of+utilitarianism
    • http://triple-doska6.club/63701741012htscm.pdf
    • https://cdn.sqhk.co/jugemito/hhjd0ib/zawulobiwegavisabek.pdf
    • https://jevixivuxed.weebly.com/uploads/1/3/4/6/134622771/gubin_pajena_domidulobu_dalaxeg.pdf
    • https://static.s123-cdn-static.com/uploads/4421341/normal_5fc614c0232a8.pdf
    • https://cdn-cms.f-static.net/uploads/4425737/normal_6056fe84d29e2.pdf
    • http://filemarker.store/13818291501qsvow.pdf
    • https://static.s123-cdn-static.com/uploads/4477910/normal_600451daa6469.pdf
    • https://cdn.sqhk.co/lekibapufe/ijjfN08/super_stick_classic_golf_club.pdf
    • http://bathforlegs.xyz/9878198171p72z3.pdf
    • https://tumunonapuve.weebly.com/uploads/1/3/1/3/131379134/2850922.pdf
    • https://cdn.sqhk.co/lewogasatiwu/jyOgiln/wrong_turn_2018_free.pdf
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/97eb9ce.pdf
    • https://xafukulirodut.weebly.com/uploads/1/3/1/3/131379356/rakaletabune-zuxiponek.pdf
    • http://9gusevshop.space/xibozuwodomoni35zjd.pdf
    • http://lolibixavug.22web.org/28443308092.pdf
    • http://nuvuxek.iblogger.org/squats_with_dumbbells_form.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://riramemixezu.epizy.com/radumesev.pdf
    • http://fadakivok.rf.gd/landforms_in_south_america_map.pdf
    • http://temomel.rf.gd/ashby_materials_selection_in_mechanical_design.pdf
    • https://uploads.strikinglycdn.com/files/b883704c-f0fc-4504-9219-9a84dd7d668c/is_indian_tribal_income_taxable.pdf
    • https://uploads.strikinglycdn.com/files/563b184a-85b2-4965-8bad-1cc4976d80bf/siboxonit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000175be.bin
69346dfd86d522fd63b84ba2bdf0e8b525ffc6b00d30cbb4d923958a92f207d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x175BE 5220 bytes
font_01_sfnt_off00018766.bin
b94770cb8b704cbd64ecb0e2fa203675b41ec631938fcb94c7aaf5bb52380fe8
pdf-font-stream PDF embedded font (sfnt) at offset 0x18766 11476 bytes