Malicious PDF — malware analysis report

Static analysis result for SHA-256 760405ddccd41033…

MALICIOUS

PDF

77.7 KB Created: 2021-04-16 08:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 34b28af47bbb227bc2027b264f6ebcdf SHA-1: c9c3a2066d91136c5a531cd5e1e0d01d7e8f0557 SHA-256: 760405ddccd41033a3040e1639d5f3c7e8d2866785da65d276a38814d0202dec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant heuristic indicating it functions as a link farm hosted on disposable domains. One prominent URL, https://mezovuduw.ru/strik?utm_term=toro+mower+20339+parts, is flagged as external. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

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://mezovuduw.ru/strik?utm_term=toro+mower+20339+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486566/normal_5fdb1275a4e31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408478/normal_5fc74e77ee98f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470832/normal_60506daf66608.pdfIn PDF document text
    • http://nout-sale.site/el_seor_de_las_moscas_libro_paginasikswp.pdfIn PDF document text
    • http://kifejuja.medianewsonline.com/al_quran_tamil_tafseer.pdfIn PDF document text
    • http://banquepopulaire-fr.org/picsart_photo_studio_pro_apkquomm.pdfIn PDF document text
    • http://francobusiness.com/how_to_replace_range_hood_light_bulb_whirlpoolc3gst.pdfIn PDF document text
    • http://kvyovk.xyz/zopozetasepobuxupilikefcmxp4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385235/normal_5fcae601103b2.pdfIn PDF document text
    • http://agentsecure.space/different_environments_worksheetsnj4zv.pdfIn PDF document text
    • http://gifavojam.scienceontheweb.net/manual_de_epidemiologia_y_salud_publica_hernandez_aguado_descargar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366324/normal_60066a680efa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491686/normal_5fee139d02fa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481158/normal_605f3bac52a8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419451/normal_6011bd82bdf87.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/mimadavomoguliwusaponokex.pdfIn PDF document text
    • http://legexebe.medianewsonline.com/active_and_passive_voice_past_tense.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412582/normal_5ffece6c97a77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepizevut.atwebpages.com/71972168218.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/american_history_textbook_mcdougal_littell_answers.pdfIn PDF document text
    • http://rupesujutiwu.myartsonline.com/basic_english_usage_michael_swan.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_off0000f1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 5568 bytes
SHA-256: 8d7c027166cd93a62d4792db899ccb113415289cf74a382e2e77b8aa9d3b42c6
font_01_sfnt_off000104b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B9 10936 bytes
SHA-256: a48b4d3d79a718d2608dab7304b46411ce7fe9415a88b9e347988ac43074c5b1

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