Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef60b9693b4ea32…

MALICIOUS

PDF

93.6 KB Created: 2021-04-02 23:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5fe528c130a2f5462d9b1fd1e4e88eb6 SHA-1: 50b72f94f066cedbf2b7fa6f0917f549bf15e17a SHA-256: fef60b9693b4ea32da28818e9c6db2a12ede682768048ad15fb1448c862f6885
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://gimoguvi.ru/wix?keyword=bank+reconciliation+mcq+pdf+with+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468286/normal_60199df8ad181.pdfIn PDF document text
    • https://tegotaxuwore.weebly.com/uploads/1/3/2/7/132712324/4676730.pdfIn PDF document text
    • https://cdn.sqhk.co/xanapaje/hjmjijg/slots_free_spins_no_deposit_2020.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/31743f9e7761e7.pdfIn PDF document text
    • http://salea.site/tomelinimu4f8sx.pdfIn PDF document text
    • https://muberelikaxisax.weebly.com/uploads/1/3/1/1/131163953/475257.pdfIn PDF document text
    • https://cdn.sqhk.co/zexoribuj/Qibhehc/31783252901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468534/normal_5fd28becc671e.pdfIn PDF document text
    • http://openchambre.xyz/60273696657lc6kf.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/ckFUhjI/legless_amphibian_reported_from_meghalaya.pdfIn PDF document text
    • http://onlinetyz.xyz/fudavatixarifidunanusmi0jw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_60407d89a7499.pdfIn PDF document text
    • http://sellamorem.com/vilogimowawo8xfwc.pdfIn PDF document text
    • http://ferobuxanax.iblogger.org/lixisoramitavazuz.pdfIn PDF document text
    • https://cdn.sqhk.co/daxutoxod/RIUMOdT/fort_wayne_rescue_mission_address.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5fec06af9e50c.pdfIn PDF document text
    • http://shopsupergood.site/81310844284guvn0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_5fd3bd5de0603.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://safonakidu.rf.gd/munexepada.pdfIn PDF document text
    • http://ralemagafi.epizy.com/35966851529.pdfIn PDF document text
    • http://tilixufevoj.epizy.com/24952470195.pdfIn PDF document text
    • http://jaxojediregaj.epizy.com/edexcel_igcse_human_biology_revision_notes.pdfIn PDF document text
    • http://vimobuzu.epizy.com/inorganic_chemistry_book_for_iit_jee_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 5724 bytes
SHA-256: 8b556101d1bbcbb51ab535ecccd7d27f2ed890d446886db0086ab240055398d8
font_01_sfnt_off00012c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C64 11252 bytes
SHA-256: 976588d6cdcba421a34acad9060aa55ea7c55c7dfa4511ad24dd6efb9b2d2cf5
font_02_sfnt_off000152ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152EC 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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