Malicious PDF — malware analysis report

Static analysis result for SHA-256 955a1588e05ed1b6…

MALICIOUS

PDF

67.8 KB Created: 2021-03-16 00:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6bf553310358f81724af96d307b24deb SHA-1: 5aaa2731904d6bbde188aa6eab932080c42cf1ef SHA-256: 955a1588e05ed1b6e7cd98d509ad93180eada67f9ccd74bcfb971f454858a6a6
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://dugedepap.ru/strik?utm_term=peace+sports+50cc+scooter+body+parts PDF link annotation
    • http://verenewesukifed.22web.org/13821367586.pdfIn PDF document text
    • https://kutebebi.weebly.com/uploads/1/3/4/5/134528954/9558458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482190/normal_6011c3659073c.pdfIn PDF document text
    • http://fibilif.iblogger.org/voxalurajonegurafat.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/93797468176.pdfIn PDF document text
    • http://pexarinolal.mypressonline.com/convenio_de_ginebra_1929.pdfIn PDF document text
    • http://i-men.ru/how_to_override_verdant_thermostat0o80c.pdfIn PDF document text
    • http://tizezs.xyz/534548861192wj2n.pdfIn PDF document text
    • https://regifedemez.weebly.com/uploads/1/3/1/4/131406591/cc90d68a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485321/normal_5feec5fd13145.pdfIn PDF document text
    • http://kitazixozakabu.sportsontheweb.net/tiger_rice_cooker_made_in_japan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_60112ac007edd.pdfIn PDF document text
    • http://copyrightsupporteds.com/75524286932vtg91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4867414-d343-4b17-aa09-e536b2fd145d/how_to_calculate_the_rating_of_a_transformer.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/taxapinudosuf.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/22151819192.pdfIn PDF document text
    • http://mosemoxibug.rf.gd/what_kind_of_jobs_can_you_get_with_an_english_literature_degree.pdfIn PDF document text
    • http://bejopobu.epizy.com/aestiva_anesthesia_machine_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3314667-98d5-4e31-82bb-5f3582bc959a/muvixesaxipozezadek.pdfIn PDF document text
    • http://pebulibupa.rf.gd/calendario_noviembre_2018_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cad87241-b7c7-4936-b121-e2a8d601a14c/87180737693.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_off0000cb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB28 5544 bytes
SHA-256: dd8e0d9ed0842931733213a2f7150251ccab82365a4a061df8b0647420b9339c
font_01_sfnt_off0000de0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0F 10368 bytes
SHA-256: 105026d837185a418f61003ebed95eb1706785539b7e508f0751f3d91389b79d

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