Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d49b790366444aa…

MALICIOUS

PDF

82.3 KB Created: 2021-04-06 16:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4edf0518f4ff0aa4a9a8ff2b78bfc59f SHA-1: ea56da767ddea7b750efdbc6ebe0064c4a5516ca SHA-256: 2d49b790366444aa00250c72342113ab41fccde4347464965d2cf7e8311b9b58
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains multiple external URIs, with a prominent one being https://mezovuduw.ru/strik. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://mezovuduw.ru/strik?utm_term=cursos+de+ingles+en+orlando+economicos PDF link annotation
    • http://idealica-italiaoficial.site/what_is_the_purpose_of_the_arrow_in_a_chemical_equation48wm7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495409/normal_6003c02b78e58.pdfIn PDF document text
    • http://getcreditcheck.info/bissell_powerforce_compact_bagless_vacuum_2112_new_version_of_1520_reviewsvugzn.pdfIn PDF document text
    • http://fedezin.scienceontheweb.net/masakosibinibet.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/biochemistry_notes_download.pdfIn PDF document text
    • http://trysalon.xyz/bofijatugemulanhi6fz.pdfIn PDF document text
    • http://coolvdomaion.online/el_arte_de_la_seduccion_robert_greene_libro_completowfiw8.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/david_goes_to_school_activities.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_6035220abb68e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467950/normal_60052dd9d7b9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451353/normal_5fef41949949d.pdfIn PDF document text
    • http://kezijumedet.mypressonline.com/fodemowavade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459035/normal_6033a62deae09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_6015bc2fdfd85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486037/normal_6068faa0eda1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuluxewamotate.atwebpages.com/13123811475.pdfIn PDF document text
    • http://noroved.myartsonline.com/89235489121.pdfIn PDF document text
    • http://jaweratiz.atwebpages.com/bronkodilator_adalah.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_off000100c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 5164 bytes
SHA-256: 4323c5d743daec045d417949161a4ed7233283d5b6868d4845b40671c58440dc
font_01_sfnt_off0001123c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 12972 bytes
SHA-256: 6c17a267baf8636b62fb39abbf6231c97a0dd21de0808ae0a01236527445fa9f

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