Malicious PDF — malware analysis report

Static analysis result for SHA-256 e902d5bda609923b…

MALICIOUS

PDF

74.0 KB Created: 2021-04-22 12:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b32cc878085203e4079907519e0dfda0 SHA-1: 792309a37bb0782b99dc1cdc506be222ff669396 SHA-256: e902d5bda609923b9d3a5b3a58d0a9ba68df32b5267242bc327df5ec0a8587e9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection, indicating malicious intent. The document contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The embedded URLs likely lead to the download of a second-stage payload.

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://vilenefex.ru/strik?utm_term=download+java+jdk+8+linux+64 PDF link annotation
    • https://cdn.sqhk.co/fosapuzisas/jdJEjfR/35596446961.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/jbijdij/wafezalozipunarufojuk.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/aprender_gramatica_ingles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463010/normal_601e22237b710.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/mfm_prayer_rain_january_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/Ihficjg/81273894653.pdfIn PDF document text
    • http://rewokujow.scienceontheweb.net/musaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415929/normal_5ff5f8d674edc.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/hRPghgf/capsule_wardrobe_herbst_winter_2020.pdfIn PDF document text
    • http://dabedera.mygamesonline.org/wadobujepaju.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/UnTxohd/gogatikafinasoporiniki.pdfIn PDF document text
    • http://sikazigazes.mypressonline.com/51300747208.pdfIn PDF document text
    • https://cdn.sqhk.co/jezumasulej/cLiePa6/pegifitomapakiz.pdfIn PDF document text
    • http://gugolufixa.mywebcommunity.org/46960129339.pdfIn PDF document text
    • https://cdn.sqhk.co/zubejavaxuvu/ijgfLCh/dorezavis.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/93477353476.pdfIn PDF document text
    • http://zajilakofudo.scienceontheweb.net/7_wonders_of_the_modern_world.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/turip/disorders_of_protein_metabolism.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/what_is_finite_element_method_in_mechanical_engineering.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD533 5340 bytes
SHA-256: fbac9f28e4e52196b75f988ba1448e22daae68d0be5d8dde1924ebac7dcdc0e6
font_01_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 15812 bytes
SHA-256: 8bd08075c372c46addbf3ca9d440994d3c963e8ce43107673c9d71430b8ff950

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