Malicious PDF — malware analysis report

Static analysis result for SHA-256 51083cf2125859cf…

MALICIOUS

PDF

72.9 KB Created: 2021-03-19 12:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3b0768f177952bf39bc25f033b15c1c4 SHA-1: 92a9c2d8dee15454e0260fed80a6db43f86e57a4 SHA-256: 51083cf2125859cfc784e44e1be069229708c455167bafc7382fa8fad340bf31
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 0.9996

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://leonvi.ru/123?utm_term=garmin+lidar+lite+3+datasheet PDF link annotation
    • http://familyit.pro/hindi_film_2015_dilwaletfsin.pdfIn PDF document text
    • http://paselon.getenjoyment.net/comic_storyboard_creator_free.pdfIn PDF document text
    • http://ejinaya.com/37990247149dalks.pdfIn PDF document text
    • http://fafikup.scienceontheweb.net/best_financial_books_for_beginners.pdfIn PDF document text
    • http://whalesqpa.fun/tadapotalatuvolaxiafqp0.pdfIn PDF document text
    • http://brumbum6.xyz/honeywell_thermostat_rth6580wf_installationquwyf.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/48132405988.pdfIn PDF document text
    • http://zolepop.mypressonline.com/scope_of_work_meaning.pdfIn PDF document text
    • http://jumbochecker.com/asidosis_metabolik_pada_gagal_ginjal23stm.pdfIn PDF document text
    • http://pupunorip.getenjoyment.net/82032514344.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_7fa7467cf5594a6aaa839d92c9a33217.pdf?index=trueIn PDF document text
    • http://doxokalisawe.myartsonline.com/capgemini_interview_questions_and_answers.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_6f9121efeba1478db70ac770c4011c00.pdf?index=trueIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_62bcd46d6b41416faf3f0a480f132e98.pdf?index=trueIn PDF document text
    • http://baledur.epizy.com/dell_latitude_e6410_keyboard_not_working.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_f1ccba1bb6614e66a08dd6d2ed6ac242.pdf?index=trueIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_ad51c275d6ca4306b816ea11cef1b87b.pdf?index=trueIn PDF document text
    • http://dadorisisewane.epizy.com/12321463175.pdfIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_58a819d7f3f24c56ae5b836aad6a7d66.pdf?index=trueIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_9500ce0067484e5096b15f2a51839e2e.pdf?index=trueIn PDF document text
    • http://sekijipaladi.epizy.com/taylor_body_composition_scale_5780fw_user_manual.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_off0000df10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF10 5260 bytes
SHA-256: affec19e28d56b2b539b7eb819252c3335f99b23bf7ed3bc9a8de22b6d9c3473
font_01_sfnt_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 10880 bytes
SHA-256: 71127b5bdb92bac076895e8dd3ec415383db016616ee0b60d9185324a856c2fe

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