Malicious PDF — malware analysis report

Static analysis result for SHA-256 df19b134b6205588…

MALICIOUS

PDF

84.7 KB Created: 2021-03-05 00:37:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 10718f9b72396e9a107dd330d5d1268c SHA-1: 75b5f5833667f082efdac9f5b3ee7405a9c27125 SHA-256: df19b134b62055880f185a65517ad4496ed345e84caa16098f900ac084da70b6
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

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://ponafet.ru/award?keyword=game+maker+studio+2+3d+models PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384628/normal_5fe7daaca8cce.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/UQlibH9/lugafewu.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/82469138553.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/58556832235.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxaletadi/jfRgchc/23652975373.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/jiCzhgy/charades_generator_animals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_602604814d207.pdfIn PDF document text
    • http://mekomob.getenjoyment.net/the_smart_classroom_management_plan_for_elementary_teachers_review.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/kijofilejidunasidaxaxeger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_600b027a0d713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459937/normal_601d53208d399.pdfIn PDF document text
    • https://cdn.sqhk.co/lilajibusizu/EYyih89/lee_brice_songs_in_the_kitchen.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/how_to_clean_a_george_foreman_outdoor_electric_grill.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/how_to_reset_airbag_light_on_2006_chevy_silverado.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387807/normal_5fed6fd295add.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_5fd0b8c5a4fa4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojazexodiwosi.epizy.com/moxozixavibukizi.pdfIn PDF document text
    • http://kodinola.rf.gd/68519747473.pdfIn PDF document text
    • http://dozonox.epizy.com/fundsmith_equity_fund_i_class_accumulation_factsheet.pdfIn PDF document text
    • http://seguwogira.rf.gd/funimorixodifezawozexav.pdfIn PDF document text
    • http://nixaruxabonijiw.rf.gd/66367148503.pdfIn PDF document text
    • http://gamelaluwer.myartsonline.com/79381693875.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_off00010675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10675 5360 bytes
SHA-256: 67ca4de7044f73ce7153b2f72192338991a0bd0fd0bbeea49a25afc996ad44a3
font_01_sfnt_off0001189e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189E 13904 bytes
SHA-256: 141201b8163d79ea2da1999a22f3a27a873cd93f6e69d45d1db2461cb34c3fd5

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