Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de6494a9ce2ac1b…

MALICIOUS

PDF

74.9 KB Created: 2021-06-12 01:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f8d9ce2b0c644b22c9de32028d1a0dba SHA-1: ea46c8dec86b2cc953d0cd92dfcbb4870f5257c7 SHA-256: 3de6494a9ce2ac1bfeeba28114feaecb8ae6260edd34569e7a5ab1d35152d3b9
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://irlanc.ru/pbw?utm_term=2k19+wwe+mobile PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488329/normal_5fdc34485279b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5ff517079a595.pdfIn PDF document text
    • https://padabomax.weebly.com/uploads/1/3/4/6/134681696/9c9c54c94a.pdfIn PDF document text
    • https://wakazezoloke.weebly.com/uploads/1/3/3/9/133999839/werepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447437/normal_603dee9c4d482.pdfIn PDF document text
    • https://rojaduvesasesa.weebly.com/uploads/1/3/4/7/134751848/lutesalipabutew_saworajegita.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/3950c6bf-a76c-48e1-b3d6-e64da658cf51/vudukesadupeserilulu.pdfIn PDF document text
    • http://zujomib.pbworks.com/w/file/fetch/145161699/ralevewasamoliwez.pdfIn PDF document text
    • http://bijinim.pbworks.com/f/zirozeluzipilabugevu.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/f/71635757583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c367e5-7e0b-480f-a9c6-f773fdfed371/53556805773.pdfIn PDF document text
    • http://guronavageba.pbworks.com/w/file/fetch/144506202/what_is_the_best_type_of_marlboro_cigarettes.pdfIn PDF document text
    • http://sirazumebow.pbworks.com/f/is_pokemon_showdown_good.pdfIn PDF document text
    • http://biribivit.pbworks.com/f/pirates_of_the_caribbean_series_list_order.pdfIn PDF document text
    • http://rukuvekuke.pbworks.com/w/file/fetch/145133289/animal_farm_summary.pdfIn PDF document text
    • http://togusan.pbworks.com/f/disegno_tecnico_industriale_chirone_tornincasa_vol_2_download.pdfIn PDF document text
    • http://luwivaj.pbworks.com/f/libadekebex.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/w/file/fetch/144975501/40394346607.pdfIn PDF document text
    • http://donigipoz.pbworks.com/w/file/fetch/144962118/standard_course_hsk_5_workbook.pdfIn PDF document text
    • http://febokipup.pbworks.com/w/file/fetch/145090977/free_call_of_duty_aimbot.pdfIn PDF document text
    • http://nenikobowon.pbworks.com/f/lolasobekipiv.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_off0000e80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 4888 bytes
SHA-256: 1da031941b83c8b5f59c2270d80907886f3d0a79ef740092b7abd6e5fedb12d3
font_01_sfnt_off0000f8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C1 10976 bytes
SHA-256: 6b6ba2bb2dd60f091b966e3815fb597b266e73c89bbadb0d1275eaa511002151

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