Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea17b470d3207691…

MALICIOUS

PDF

82.1 KB Created: 2021-05-13 08:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1ffc29cdb67ff683f2a4244c36020dea SHA-1: f232b6ca14f98f7312a150f350ab2a2ac6cd0871 SHA-256: ea17b470d3207691800728c2b8cf3558af025b01159bd133d2ad7ace51f34197
126 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search results, directing users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=what+is+the+importance+of+learner+centered+psychological+principles PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408703/normal_60055aea3c5d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_60141eceee242.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485329/normal_5ff1305ad06de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5fd9d63323609.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366395/normal_5fffb1ffa2b1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385198/normal_5ffb4a146be10.pdfIn PDF document text
    • http://presente-top.store/prime_minister_resigns_over_catholic_emancipationw0zsu.pdfIn PDF document text
    • http://price-list.moscow/jamelowajibumejaxugotageru2ey9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_60446e9a8ad6a.pdfIn PDF document text
    • http://slmit.fun/19639730321td7gd.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/the_banker_s_secret_marc_eisenson.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_6017b98b15fa2.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/yamaha_majesty_250_user_manualgcgov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_606939c603bc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5fd39ba55a382.pdfIn PDF document text
    • http://fasad-dom.site/platicas_pre_bautismales_en_un_dia_guadalajara4hjhu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_603475242630a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogalibamadom.myartsonline.com/alberta_wmu_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e356d5-8ae1-4196-a996-50c2cde84438/lujeraxisisunupoga.pdfIn PDF document text
    • http://xotaferuju.myartsonline.com/jvc_digital_video_camera_gr-d250u_charger.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/22885242337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a4b683-134f-4532-831f-cdfbd2a1ecdf/doll_house_furniture_au.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_off0001039b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039B 5684 bytes
SHA-256: 759cb741bf599d5bc03ada05f691c45ca95fd76677da8b30314aacd5ecf17cad
font_01_sfnt_off000116da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 10372 bytes
SHA-256: b0ce2f0eceb5acc4a8124b37597cc3057f9bc6ed23b768aa60450f00c924681a

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