Malicious PDF — malware analysis report

Static analysis result for SHA-256 37481a3c010b9c16…

MALICIOUS

PDF

73.8 KB Created: 2021-03-09 08:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4a95d3f0a5088edd05805bb39f8f017b SHA-1: 9794d2d1076879a5244ca06d1e7b4addf65f9060 SHA-256: 37481a3c010b9c169b038c776e0b8dd936949f61fe06e35e5b87811eec4ff116
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 0.9997

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://leonvi.ru/wix?keyword=one+horned+goat PDF link annotation
    • https://cdn.sqhk.co/ramidazumiko/jdjjcOx/shark_ion_robot_r85_replacement_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/fhg6ihK/59047207299.pdfIn PDF document text
    • http://instapriz365.online/intergovernmental_panel_on_climate_change_report_2018hlsdp.pdfIn PDF document text
    • http://bhd-management.space/rejededpgr55.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/igdLm0t/yellow_souliers_pour_hommes.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/1gjieFG/does_coffee_increase_testosterone.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/YgjYAhi/67934355091.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/hegxieB/81972047242.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/djehaig/free_online_hide_and_seek_games_without_downloading.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/hfh11G1/71376672717.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/nAhfhci/negesapogisorawarijaludu.pdfIn PDF document text
    • https://cdn.sqhk.co/fanekizesedi/hWIgdtk/98440246825.pdfIn PDF document text
    • http://se-mrush.com/infinix_note_7_lite_price_in_pakistan_4gb_ram_64gb_romc8hyj.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/hcjeijH/matrix_matrix_multiplication_matlab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/50788535081.pdfIn PDF document text
    • http://wodebupikeziv.epizy.com/how_to_install_diono_radian_3r_forward_facing.pdfIn PDF document text
    • http://gamasivixot.epizy.com/sajobizemapudij.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/how_much_do_interior_decorators_make_in_texas.pdfIn PDF document text
    • http://fasevirova.rf.gd/13201856252.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/88732350287.pdfIn PDF document text
    • http://xawisis.rf.gd/holt_mcdougal_larson_algebra_2_textbook.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CB 4904 bytes
SHA-256: d7cd541107d81552e9bafd04b2b4aa12c2a8c757553f2d39912bccaeff97ce5a
font_01_sfnt_off0000f76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76F 10184 bytes
SHA-256: 3fdc925c17b6d2ea9089abb0550e716ba186218e81de644c790fe4de22ff92ce

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