Malicious PDF — malware analysis report

Static analysis result for SHA-256 39926e460b125241…

MALICIOUS

PDF

74.7 KB Created: 2021-09-11 02:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 920eca45597b4528b0e8843d9b52c43e SHA-1: 1a08fa2724ed82b42776789c509b51f6770a32e9 SHA-256: 39926e460b125241a1b9eea5a1ca621edc4f7ad6967818bd03e0d683f9e389f6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to suspicious domains, and exhibits characteristics of a link farm. The PDF structure and embedded content suggest it's designed to redirect users to potentially harmful sites, possibly for further exploitation or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://blccy.com/userfiles/files/toxed.pdf In PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/kugopupovibarilipigiwot.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/sitenoj.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109030837079557.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/judafem.pdfIn PDF document text
    • http://sparkpro.lv/content/file/kivitowukinuduxixularijub.pdfIn PDF document text
    • http://gr-chem.com/upload/files/94868420295.pdfIn PDF document text
    • http://designgaleria.hu/userfiles/file/88593297123.pdfIn PDF document text
    • http://newgoodluckcrane.com/admin/uploadfiles/file/71512387764.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/ruwumoxividusemegilinimuw.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/48524039725.pdfIn PDF document text
    • http://agro-partner.com/Image/files/lidimopikepewurufekuri.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/67720941558.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613576d5b9250---745595435.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/wusakijetunef.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/54189525928.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/99073811071.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/jejajozavifupawetej.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/malirejosodujaxaku.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/texob.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/161319bc7804a1---61010034699.pdfIn PDF document text
    • http://podarox.ru/public/files/winabemekeleluxedolun.pdfIn PDF document text
    • http://moretonassets.net/userfiles/758250874.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/80724042018.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=app+launcher+for+tvPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DC 16308 bytes
SHA-256: da6f8c0859ddda013ccb75b2cdf596546a1a443476a8696adc140d15f4f825cb
font_01_sfnt_off0000edbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 10464 bytes
SHA-256: c62db8c5d18e3cc21611b4e26a13308d4b8185f9986200a99cbb3812ba040cb0

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