Malicious PDF — malware analysis report

Static analysis result for SHA-256 360b82aa49a73a02…

MALICIOUS

PDF

79.2 KB Created: 2021-06-14 12:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00ee95ceb12198e0a3701a9f7674fcd3 SHA-1: c7629f90f2672914150ff805ba90e33e13e3e93e SHA-256: 360b82aa49a73a0291945f782de0d8a8726354a2a0116327da0383419d46ab6d
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a phishing or spamming operation. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous unknown reputation URLs strongly suggest malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/123?utm_term=baby+games+for+2+years+old+apk
    • https://sisareses.weebly.com/uploads/1/3/1/4/131454440/3838264.pdf
    • https://cdn-cms.f-static.net/uploads/4402938/normal_6036168fe013e.pdf
    • https://wegekasi.weebly.com/uploads/1/3/4/6/134678838/828a6bc7cd9f536.pdf
    • https://cdn-cms.f-static.net/uploads/4383924/normal_60518c001798e.pdf
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5fda747bb4742.pdf
    • https://kewegiru.weebly.com/uploads/1/3/1/4/131438086/kigex.pdf
    • https://static.s123-cdn-static.com/uploads/4368487/normal_5fdd42591f535.pdf
    • https://cdn-cms.f-static.net/uploads/4493550/normal_603bba776d4d8.pdf
    • https://static.s123-cdn-static.com/uploads/4501962/normal_5ff807bdb6616.pdf
    • https://madoguwulivusi.weebly.com/uploads/1/3/0/7/130775056/xijutunafi.pdf
    • https://gunapozebufe.weebly.com/uploads/1/3/4/3/134316646/785fa340c3ae.pdf
    • https://static.s123-cdn-static.com/uploads/4443803/normal_5fe3bd1b6a2cd.pdf
    • https://cdn-cms.f-static.net/uploads/4500911/normal_60451277cb955.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mevuteled.pbworks.com/f/wef_competitiveness_index_2017.pdf
    • http://mizelabe.pbworks.com/w/file/fetch/145269609/anatomy_and_physiology_essay_questions_with_answers.pdf
    • http://molitutolu.pbworks.com/w/file/fetch/144954180/25079164508.pdf
    • http://guvevef.pbworks.com/f/rofurerasuxuwizivimikeg.pdf
    • http://jilawuxifi.pbworks.com/w/file/fetch/144580431/imagenes_de_goku_ultra_instinto_cuerpo_completo_para_dibujar.pdf
    • http://kimotamiju.pbworks.com/w/file/fetch/144526284/let_god_guide_your_steps.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_off0000f704.bin
1e2db479217633cb071277ec0aa4d9e0cee05005595a89d398608a9f77acb7ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF704 5848 bytes
font_01_sfnt_off00010ae0.bin
e2bb4c90b6bd83a1342c4fc5a48c8e156dd701e4b5fb47a8cbfec65401bd5675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE0 10788 bytes

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