Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f016255e3fa4b75…

MALICIOUS

PDF

76.8 KB Created: 2021-04-04 03:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6bc36ee499c7145c0993e399d32b604e SHA-1: 1060142470f6707cbcf628cf3c4c8b94d0ff222a SHA-256: 4f016255e3fa4b75114f8e3640a2d3a6ebe1c1e5a04a0331832815b612b0dcfb
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=nonviolent+communication+marshall+rosenberg+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460255/normal_60636d2a17480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475719/normal_601ec33b3688c.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/jhL7PQK/7247055279.pdfIn PDF document text
    • http://nefesuru.iblogger.org/definisi_politik_malaysia.pdfIn PDF document text
    • http://wuwodijutorem.iblogger.org/time_inception_sheet_music_patrik_pietschmann.pdfIn PDF document text
    • http://lestyprin.online/iucn_red_list_guidelines0qkid.pdfIn PDF document text
    • http://magnifioco.site/canada_visitor_visa_form_5257xz816.pdfIn PDF document text
    • http://stikc.xyz/dell_latitude_e6430_operating_manualkcyjz.pdfIn PDF document text
    • https://cdn.sqhk.co/tupulezi/ggBKOhd/17465731092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5fe9a216de8e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409797/normal_5ff5e8be0d0d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5fe637689a9f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nagatesi.epizy.com/17870356236.pdfIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_a29dd1bb80b14db6bf5d875ef7f90a15.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_2631b4fd475f4866b73efaacc3011d0f.pdf?index=trueIn PDF document text
    • http://notizawudix.epizy.com/cuestiones_de_sociologia_pierre_bourdieu_gratis.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/77985844606.pdfIn PDF document text
    • http://pixutuvaw.rf.gd/15259468588.pdfIn PDF document text
    • http://keguwaburafokul.epizy.com/nujeraliki.pdfIn PDF document text
    • http://nakepusejedub.epizy.com/springform_cake_tins_tesco.pdfIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_b39f0e5e5a70485caeb4d5ea07983589.pdf?index=trueIn PDF document text
    • http://xawoforusur.epizy.com/which_hand_to_read_for_females.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_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 5484 bytes
SHA-256: 21d58e1717ad0abf4c299b233ca58942fd8df371a6272742895cc71568c71435
font_01_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 10520 bytes
SHA-256: 4c9609cba3f2f43153154eba3b411d99f32f7f560319eb678f59383f68d3e6cd

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