Malicious PDF — malware analysis report

Static analysis result for SHA-256 722e17d9d60e5eab…

MALICIOUS

PDF

74.7 KB Created: 2021-02-25 09:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bc151ab112488a72c30f1cf58181936f SHA-1: 9bb68dd0a86953b4cb6bf720f073bff7525605a9 SHA-256: 722e17d9d60e5eaba41110e66c98f52344460ad2af738fd137f0ff0d1c20d4a9
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

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://druttle.ru/wix?keyword=water+level+indicator+sensor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458148/normal_6013c7008c16d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426257/normal_6019306d41c9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_5fd0e4271ee40.pdfIn PDF document text
    • http://tophomework.space/another_eden_tome_guidet0a27.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/jezaraxupimegonadotu.pdfIn PDF document text
    • https://pidexijot.weebly.com/uploads/1/3/5/3/135316959/e8e170d6b43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422372/normal_5ffe98cc1dc3a.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/dopeboli.pdfIn PDF document text
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/5914822.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/transformational_leadership_in_nursing_journal_articles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_600b551c07cb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fimomisuv.rf.gd/suwojodogomogonufi.pdfIn PDF document text
    • http://sabinozugi.epizy.com/aviary_apk_full_cracked.pdfIn PDF document text
    • http://bokatamekal.rf.gd/breast_cancer_ribbon_pictures_to.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/bow_tie_pasta_with_chicken_and_peas.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/church_premarital_counseling_near_me.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_off0000e96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96D 5004 bytes
SHA-256: f36bc568dbf93fc1c6d2e3119996d05c829831f0a8b67e52271157b417a1d121
font_01_sfnt_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 10368 bytes
SHA-256: 9d2f0153d2e9360954ec7c184361f510a97d747ed16ab543f308099ca990b6d6

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