Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ac3da9193722bc…

MALICIOUS

PDF

79.4 KB Created: 2021-02-28 22:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 108a2822e99937b14e53f683bb64b62f SHA-1: c6a0d2f040906e2b7cb82ffcfaa64974362dd8e5 SHA-256: 17ac3da9193722bc0757410c2c0951605ace690c84be94152b9073c5fcf8bf2d
166 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains invisible links that redirect to a CAPTCHA-themed lure hosted on disposable web infrastructure. The presence of multiple external URIs and a link farm heuristic suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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/123?utm_term=how+much+is+big+little+lies+on+amazon+prime PDF link annotation
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/kezesazopokorevopevo.pdfIn PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/rulanamasef_tekagu_regawo_malisidobojuza.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/77732923057.pdfIn PDF document text
    • http://hh666o.site/driver_theory_test_questions_and_answers_2018paip6.pdfIn PDF document text
    • https://vumiluvitut.weebly.com/uploads/1/3/2/6/132696113/posoba_kikufafafeb_bidenojafojofi_vodunutimaveg.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/moultrie_a-5_gen_2_troubleshooting.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_5fd672676a070.pdfIn PDF document text
    • http://avtovishki-msk.ru/marejinipirr3.pdfIn PDF document text
    • http://lozhobelir.space/lokakixufidejigigay0nz3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426558/normal_601e1ae4c0c30.pdfIn PDF document text
    • https://dejibifugav.weebly.com/uploads/1/3/2/3/132303230/2597334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406806/normal_600822c2ae537.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/marshall_valvestate_2000_avt_150_half_stack.pdfIn PDF document text
    • https://menaminalopu.weebly.com/uploads/1/3/5/3/135318725/vosizojaxaja.pdfIn PDF document text
    • http://zogaranana.22web.org/enable_captcha_contact_form_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faleferesevo.onlinewebshop.net/xejozotilejaluxevewe.pdfIn PDF document text
    • http://rupesujutiwu.myartsonline.com/kulixakobasikekolinukux.pdfIn PDF document text
    • http://bakesuli.epizy.com/notajoritulut.pdfIn PDF document text
    • http://fanalejowegop.atwebpages.com/how_to_choose_dental_implant_specialist.pdfIn PDF document text
    • http://topawod.epizy.com/how_to_control_bluetooth_volume_on_amazon_fire_stick.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_off0000f994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF994 5592 bytes
SHA-256: 4508d12d5fdbf540669bece05bc72569b5fbcde7f85ec5a1c928435b6abcad2f
font_01_sfnt_off00010c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C87 10460 bytes
SHA-256: 97c12a5b6b64d8653be1c5a826ec9ce2d2908749ec9cb19e1d8a198a227d5407

Open this report in the interactive analyzer, or submit your own file for analysis.