Malicious PDF — malware analysis report

Static analysis result for SHA-256 510f9f254917dba3…

MALICIOUS

PDF

71.7 KB Created: 2021-03-19 07:25:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ddc9d36c6a4ec56531dd5d699908284d SHA-1: 1ef247672fec8a58c09fcf5686fa08b2e013e167 SHA-256: 510f9f254917dba300cd365560e9b6b5ac06df1a2f56f13e3a3d73d316d35c55
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 0.9996

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://seumenha.ru/123?utm_term=addition+for+grade+1+worksheets+pdf PDF link annotation
    • http://viniveba.mywebcommunity.org/what_does_differential_pressure_sensor_do.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/what_did_tim_carry_in_the_things_they_carried.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/19694529311.pdfIn PDF document text
    • http://zizopeja.22web.org/23022131846.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/best_database_management_system_software_for_mac.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/how_to_connect_a_harbor_breeze_remote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fowibetubopofaf.rf.gd/jidobatozo.pdfIn PDF document text
    • http://xarugutivi.epizy.com/inventory_checklist_template_restaurant.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/att_z222_gophone_manual.pdfIn PDF document text
    • http://kivajujudupogij.epizy.com/9446102467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9ab40b-8c78-4ef0-8119-5625d6a3b87a/16072548029.pdfIn PDF document text
    • http://wigamezula.rf.gd/54524646597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da60ddc5-8137-47b8-ac20-dee46ab36c56/julagatera.pdfIn PDF document text
    • http://venavabumekaj.epizy.com/nizagedizaguwudarezonudet.pdfIn PDF document text
    • http://xesidif.epizy.com/9839528194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4d3382-c1c7-44e1-ad72-90ec5c142697/zivilomipasatamolanotiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/488ba730-3a3b-4d96-8554-1087a05ebbed/33440318533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee6ca0cb-659c-43fc-a9f7-e26dc51faf08/99728949702.pdfIn PDF document text
    • http://gotuwutusefaw.epizy.com/bejejuviretenabevad.pdfIn PDF document text
    • http://bosagiriwamokin.onlinewebshop.net/acidity_and_alkalinity_of_water.pdfIn PDF document text
    • http://numowun.rf.gd/inquest_report_sample.pdfIn PDF document text
    • http://kaxegukepoxar.rf.gd/25510769945.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_off0000da42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA42 5468 bytes
SHA-256: cc6628a75fffd98b5f0e2c08ddcc1ed3497f67ff094f605adf1cd7989191cb54
font_01_sfnt_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 10572 bytes
SHA-256: 31a0a3d2c84f86e3131d61a9a58148ed2ce29a0609040258aff47c173dfacff2

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