Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5937ddc3bc6372b…

MALICIOUS

PDF

77.1 KB Created: 2021-05-13 18:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 192c676922def3b0e0324fe46c15e676 SHA-1: 148a1408dd2e4806516268fd2e49c17d9255b261 SHA-256: f5937ddc3bc6372b1667bc54523edea60493dbe57c7e91ab25f869cf8a3a720d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains numerous external links, many hosted on disposable domains, suggesting a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristic firings point towards a phishing lure designed to redirect users to malicious sites.

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://xezojetit.ru/strik?utm_term=big+little+lies+male+cast+season+2+episode+3 PDF link annotation
    • https://birijejukuz.weebly.com/uploads/1/3/5/3/135386669/1022437.pdfIn PDF document text
    • https://telefaxukewinet.weebly.com/uploads/1/3/4/3/134320065/volaza-witolenarebuk-zowuxazuden-kutatididep.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/fumukovapusosozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454040/normal_6054cf50e2205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423696/normal_604ceb35061e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458421/normal_603fb872aa315.pdfIn PDF document text
    • https://cdn.sqhk.co/madobeborozu/evha8Wi/vepukijoxeboxep.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/34048669093.pdfIn PDF document text
    • https://cdn.sqhk.co/livejizilul/hjijjfz/bajironopagexuk.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/this_is_amazing_grace_by_phil_wickham_ft_lecrae.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/ieLibhj/kawigu.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/agfzpr0/tiviwinidazozebevavo.pdfIn PDF document text
    • http://laserisesiseno.getenjoyment.net/giruvigukewe.pdfIn PDF document text
    • https://cdn.sqhk.co/tifisizeliz/iDZjcN5/bp_ice_cream_lyrics_meaning.pdfIn PDF document text
    • https://zawivipesanupi.weebly.com/uploads/1/3/4/7/134724715/soveb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_7f5169d00f2742148428946e25279352.pdf?index=trueIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_c6759bee5a644882a5ab8e7942541f22.pdf?index=trueIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_e34dd3d16d8f4c6698b2d030237bbeba.pdf?index=trueIn PDF document text
    • http://sewemira.atwebpages.com/poweredge_r710_specs.pdfIn PDF document text
    • https://adc67df4-9ac4-4169-8225-f8d60376216a.filesusr.com/ugd/a1c2c7_3d0ee74c31d242c28ae93c33e4e78991.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_3646149aa90f47e791c4c587b7f39599.pdf?index=trueIn 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_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 5644 bytes
SHA-256: fb10c4bae90ba3f967d3039570c616715beda8ba489f31241314242a2539e9d7
font_01_sfnt_off0000fd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD30 12768 bytes
SHA-256: f2ccac2999e213b3b273d7da93a72ec88b572ed8ca1cb3b8b104d6225a737d7f

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