Malicious PDF — malware analysis report

Static analysis result for SHA-256 358820064207c299…

MALICIOUS

PDF

70.2 KB Created: 2021-04-03 07:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca67efc87a46372d45a684c706dc78a9 SHA-1: ec52f75840f73effb41788f554ce8d22b2012118 SHA-256: 358820064207c2997e16bef33c48e5327b25356ac68b806550ea8c70707e585e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=kappa+alpha+psi+coat+of+arms PDF link annotation
    • http://neyroskakalka.site/zanafujudogesupufisuzegacsbvd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_601f0fa38736d.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://mmamba.ru/vatajuxumujisusot4wrnq.pdfIn PDF document text
    • http://myfavoritesun.xyz/tracing_letter_worksheets_for_preschoolersp4xwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_605f751b1cf6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6a48395-9ebc-465e-8505-c4b20d7b8e72.filesusr.com/ugd/81e12b_ef93762e91814093a0e84eb2a6223e02.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/weber_genesis_ii_e-310_black_3_natural_gas_grill.pdfIn PDF document text
    • http://xaxisavubuwowa.epizy.com/82967502925.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_9bfa1d2a87ad4c7ca01003d435677b35.pdf?index=trueIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_e1f51fa7cc8146c38c79684617fc8794.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patotale/93383337735.pdfIn PDF document text
    • http://sekoran.rf.gd/13860142565.pdfIn PDF document text
    • http://jonapepubenej.epizy.com/bulloch_telephone_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/vujuvibipinevi.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/how_to_get_alpha_symbol_on_mac_word.pdfIn PDF document text
    • http://pobipegosaba.epizy.com/al_nasar_lab_test_report_online.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/vonodumabiferoz.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_a3f87365d2e04087ab588ce0bf80f2ac.pdf?index=trueIn PDF document text
    • http://wazozoludurisat.epizy.com/30974058102.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_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 5224 bytes
SHA-256: c631336aecaa973516d1d044686c1e6b379a67b072029f0de9540c1af81c97d0
font_01_sfnt_off0000e94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94A 10120 bytes
SHA-256: 3aad396ce669a157222f55b430baf193c18b0622b97933d954c4c1bac9fa5eff

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