Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cdd202e023adaf…

MALICIOUS

PDF

72.3 KB Created: 2021-03-04 04:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 70fc2dd06e9d38a545e682ebb258876a SHA-1: 76dbbe47fb3664f83cf9c0408e3933abae2b979b SHA-256: 26cdd202e023adaf83c07b775f2203d9ce6c66d2f7585a6346894a7698bde569
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via the external links. No scripts were extracted, but the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

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://jottigo.ru/aws?utm_term=rapala+high-contrast+50+lb+digital+fish+scale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427268/normal_60258e2a5a82c.pdfIn PDF document text
    • https://cdn.sqhk.co/murefazomejo/ia09hds/border_force_jobs_new_zealand.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/pggbOhb/colt_saa._45_ranger_edition.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/jezizowunivuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470521/normal_5fe6427bd8185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_602e070a0d81f.pdfIn PDF document text
    • http://tatuxuvoziparu.mywebcommunity.org/graco_magnum_pro_x7_pump_repair_kit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xewewiwuxadul.rf.gd/husqvarna_hu675awd_wont_start.pdfIn PDF document text
    • http://ruxofepugoloma.rf.gd/rutefoterofasutekasoxelab.pdfIn PDF document text
    • http://filutapokupa.epizy.com/5836569581.pdfIn PDF document text
    • http://madujenorenugax.epizy.com/columbus_dispatch_voter_guide_2018.pdfIn PDF document text
    • http://matufuw.rf.gd/agreement_letter_format_in_tamil.pdfIn PDF document text
    • http://gazunobopa.epizy.com/relationship_between_radius_and_diameter_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/cover_letter_template_for_teachers.pdfIn PDF document text
    • http://ludatijodibop.rf.gd/love_stickers_for_whatsapp.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/what_is_nation_news.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_off0000d9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D2 5864 bytes
SHA-256: 91b9c57d38b703984dd308100f911d155f8f6a65cb656c031cebf543368c75fa
font_01_sfnt_off0000edc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC6 11080 bytes
SHA-256: a2b852d6d80681022ec27509a14872cc4a1d45f1c0a8ec3a7e3d8d8c8e896716

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