Malicious PDF — malware analysis report

Static analysis result for SHA-256 d127cc98e0269a79…

MALICIOUS

PDF

72.9 KB Created: 2021-02-28 15:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2dea6012cb73fc23f132b8484cf5c72b SHA-1: d65916ef103e01bbea003381f99f619f9e68e7e8 SHA-256: d127cc98e0269a79c578834bda429a8c1882c9acaf7e6d49384f7cea0315ac35
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to design and business, suggesting a lure to disguise the malicious nature of the links.

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://mezovuduw.ru/award?keyword=logo+design+ideas+for+business+pinterest PDF link annotation
    • http://mevukavotidu.getenjoyment.net/62382953579.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/lenipowugoj.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/igh3Wtd/drinking_wine_big_glass_gif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478422/normal_5fda05430a8e4.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/90814658419.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_5ff22d9c93528.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/ihcUCao/kodiak_tents_amazon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454302/normal_6002616f26699.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/jHjgiab/bupiropazovu.pdfIn PDF document text
    • https://cdn.sqhk.co/tukutabu/j0fOhdw/au_health_vip_login.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/604VjbY/lefika.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuvebuxuloruvux.epizy.com/abrahaminte_santhathikal_malayalam_movie_video_song.pdfIn PDF document text
    • http://livibodake.rf.gd/kozujojabof.pdfIn PDF document text
    • http://biduxefu.rf.gd/befikebitobavufaja.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/behringer_inuke_nu6000_manual.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_off0000dfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDC 5260 bytes
SHA-256: 4466118a139ac67e51470889dce96742cfb000d3c59bab02db158cad99f1cbef
font_01_sfnt_off0000f1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CF 10660 bytes
SHA-256: 755f472d53333ab57fc430ff82f7d41bb635062d84ac9375792a5d53054ef112

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