Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0933f80779f1240…

MALICIOUS

PDF

74.3 KB Created: 2021-03-23 15:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 90226fe11265a3f8d672238cf92d2641 SHA-1: c3b0f7a4890852365d0e534084ab16bbb71fadf0 SHA-256: f0933f80779f1240f55e73f9f80b09bb47aac4dadd3832ae3ca108fcaf74492f
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URIs, with one specifically identified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of external URIs and the heuristic firings point towards a phishing or downloader attack pattern.

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://ponafet.ru/strik?utm_term=best+sounds+in+omnisphere+2 PDF link annotation
    • http://itdiscounts.pro/what_are_the_theories_of_aggression7lscf.pdfIn PDF document text
    • http://jepatugikanoxuv.iblogger.org/42017532425.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/jhL7PQK/7247055279.pdfIn PDF document text
    • http://sajitalunaded.22web.org/what_is_the_theme_of_the_sea_of_monsters.pdfIn PDF document text
    • https://cdn.sqhk.co/kakezesarop/ighcdYF/42958939846.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/ie5gehe/bike_racing_3d_unblocked.pdfIn PDF document text
    • http://urolog.xyz/xowojaragufufuluzisosorfvbzt.pdfIn PDF document text
    • http://how2clever.com/wavugixovodsc0w.pdfIn PDF document text
    • http://cardio-natural.info/microsoft_visual_c_2015_redistributable_update_3_rcrkl8r.pdfIn PDF document text
    • http://cardioactiveuficiale.site/ponto_de_encontro_student_activities_manualjfxdy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_7efabb7e58644638b147b81f15259b3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/roland_fantom_x6.pdfIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_bb136ea20f0642e0afd6dc9d580da4f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/vascular_malformation_brain_icd_10.pdfIn PDF document text
    • http://xewaxal.epizy.com/36038985600.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/ipcc_fifth_assessment_report_ar5.pdfIn PDF document text
    • http://gakupoxefale.epizy.com/pevijosakimidofibit.pdfIn PDF document text
    • http://desibevazivoxan.rf.gd/simofopezasujeniko.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/the_secret_life_of_walter_mitty_netflix_india.pdfIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_3554591149914108a9d47f8647592fcb.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_off0000e557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE557 5136 bytes
SHA-256: c85cec3d2ef7ba624cff930285e07ef51d978d485bcf8cf38bd2f6d47067dc05
font_01_sfnt_off0000f6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A3 11224 bytes
SHA-256: 04e7cf668dd126cc07af6fb146a5b5e11f3dbbd552d2b37e13ad74d182759b62

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