Malicious PDF — malware analysis report

Static analysis result for SHA-256 630e195f3e5c4439…

MALICIOUS

PDF

71.6 KB Created: 2021-03-16 03:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fdd0c96558d27bd2b06a8d86b085764b SHA-1: 973a478d181fd969862dfab78289f8f72332e677 SHA-256: 630e195f3e5c4439ae0d9a26dc3ddb0f9a24a1c0b99c2dfca83d75f38b5db1cd
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 0.9998

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://kuzutuzo.ru/strik?utm_term=samsung+tv+series+remote+control+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456676/normal_6032017577afc.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/scert_assam_d._el._ed_question_paper.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/afrikaans_english_dictionary_free_download.pdfIn PDF document text
    • http://maladametugal.iblogger.org/buddhist_holy_book_tripitaka.pdfIn PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/38835b78853e.pdfIn PDF document text
    • http://chatik85939775.fun/juxurovofisisesoth9e1e.pdfIn PDF document text
    • http://ranking-se.com/2008_dodge_grand_caravan_sxt_transmission_fluid6y7tr.pdfIn PDF document text
    • http://siankaanmexico.com/xidakuzabur2mntu.pdfIn PDF document text
    • https://xezaresirut.weebly.com/uploads/1/3/4/7/134712286/6922684.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/60207684303l3ljd.pdfIn PDF document text
    • http://ripuxojelirul.iblogger.org/personal_statement_for_college.pdfIn PDF document text
    • http://idealica-columbia.site/dafirikalatuno4gt9k.pdfIn PDF document text
    • http://shoop-fh.ru/subamelofezotivififhkvc.pdfIn PDF document text
    • https://bixunirejo.weebly.com/uploads/1/3/5/3/135329058/dupokutazibibox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_5fe74a4f8021b.pdfIn PDF document text
    • http://fortuneo-enligne.com/xedesugunifafizafaxagorupnseg2.pdfIn PDF document text
    • http://banquepopulaire-fr.org/taloxelizofadix9g0e5.pdfIn PDF document text
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/19eb259.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rabatelekovufar.myartsonline.com/77209726171.pdfIn PDF document text
    • http://gezojetisab.epizy.com/94294425351.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_off0000da99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA99 5420 bytes
SHA-256: dd9b89d05efd9c212b4c2c15713f1a8ac05912097b009f59221550c8b6ce059b
font_01_sfnt_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 10724 bytes
SHA-256: ea96f6555f50e74d26102580d23b82fc56d7fee99604e717eec271fc1e2bf86e

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