Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fdded60334208f…

MALICIOUS

PDF

91.2 KB Created: 2021-07-17 07:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 51a356ec0c97190fc5c1e7588d39a150 SHA-1: de0f78f36d90b7c61576c43db2d35da398c1a535 SHA-256: 49fdded60334208fca2b0a8beb500a8efe27d301dc56a21cc0b3a53366cd7813
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and other potentially malicious sites, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead victims to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3727208cf7---81383641211.pdf In PDF document text
    • https://travelstore.tn/userfiles/file/fejusijotiso.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076829f07e05---97319245966.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/lomewabevuvemetosetepit.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/nbla5ot28lfanlq1qer895k8t7/67925278402.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/69929862611.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/mepedilug.pdfIn PDF document text
    • http://grimastone.ru/files/sekenofulufedidumik.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210628024255433430xthp66vbjbff.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/1ohraqk5uh2vmfjr5rrodvfd42/17318278245.pdfIn PDF document text
    • http://pi-consulting.ch/download/xusume.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/arflqt6jl1figc3el1rro775c4/zejowiwenagozun.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/biwopofukutijego.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/2e93diiun5lrq1c9f2kk76a810/26858777388.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c308b183bb---29868768394.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/8090034213.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210605004233.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jagefalaxovugedaxakura.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/b0a85v3v0j2lhchsqipdalbka3/18359442593.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/lonikegeselasuribenukujeb.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16090c8e7a7a83---rumejitijunugajolatukav.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/xiwepifusilorogozuju.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/bemonesinipe.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/bodudunavuvuresu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=wedding+at+cana+messagePDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/72099939526.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://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_off000102d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEB 10440 bytes
SHA-256: 59fe542445358cf8ad7780ee49a2deb6c5f2b1e4093ebb04534568e803a2513e
font_02_sfnt_off0001325f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325F 17644 bytes
SHA-256: e4137b0182cfd18c677051ff9d4737ea8406231e76b2d3b0c9ce331753723ada