Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22e73ecc61b518e…

MALICIOUS

PDF

82.7 KB Created: 2021-04-03 06:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0f3c8fa4c496057d37d25db354ac4cf1 SHA-1: 236d418989887515b3c792a1f4df74249d38b023 SHA-256: f22e73ecc61b518e0a829c9399dfd6691c03c100db43a1f3e1883b98b78d92f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

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=ffta+morpher+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484126/normal_60010ad57c57b.pdfIn PDF document text
    • http://xviiivbgz.com/the_holographic_universe_michael_talbot_ebookmc21y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_605887222ac9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473419/normal_605642a52e70f.pdfIn PDF document text
    • http://menesoger.iblogger.org/fundamentos_tecnicos_del_basquetbol_resumen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_60106232cbe92.pdfIn PDF document text
    • http://tarofolezebinu.iblogger.org/audit_report_of_reliance.pdfIn PDF document text
    • http://boribonabone.mypressonline.com/nutricion_alimentacion_saludable.pdfIn PDF document text
    • http://spindlndou.space/poweramp_full_cracked_mod_apkgx11y.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/ccna_cyber_ops_syllabus.pdfIn PDF document text
    • http://fakoxime.iblogger.org/ariston_hotpoint_arxf_145_manual_de_utilizare.pdfIn PDF document text
    • http://dejogemo.22web.org/64769475837.pdfIn PDF document text
    • http://it50disconto.info/apiic_full_form_in_telugu_meaning22so8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fidegaf.atwebpages.com/sometimes_you_have_to_walk_away_quotes.pdfIn PDF document text
    • http://jasumubi.rf.gd/an_ember_in_the_ashes_movie_trailer.pdfIn PDF document text
    • http://likefiradoweze.rf.gd/penasoribanolunubagelex.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/12617499648.pdfIn PDF document text
    • http://sabepusejoponi.epizy.com/83416085306.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_off0001054d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 5200 bytes
SHA-256: a525a559699f763be25f89b2e7dcd134331f527dd87c07c5f69af3f360eb1d9a
font_01_sfnt_off000116d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D9 11524 bytes
SHA-256: 1f34a1618538013bd7f43125d09f33d967379efab1dce10cda5d82ea9b0bdc0b