Malicious PDF — malware analysis report

Static analysis result for SHA-256 647c4745659a8958…

MALICIOUS

PDF

80.4 KB Created: 2021-09-06 08:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fd848481a5a8a86283a04985271925ac SHA-1: 09811262fc84dee6d592feeeddb853943e48b9ed SHA-256: 647c4745659a8958017eaf6d57e0de1fffecc61b962be9d7f804d2bc0eb4cec6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also features a large number of external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.fishandcosolicitors.com/uploads/files/joxatobekonar.pdf In PDF document text
    • https://gkia.org/kingkong/userfiles/files/21140331553.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/xufemapewa.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1655c21503af48e576abc76ed7ce16c4/fobegisuvesex.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084fc4cd29cc---fenona.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/97277387367.pdfIn PDF document text
    • http://chromatographvials.com/d/files/91808072472.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/73576407566.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/jnt3025sad5pq9akdee78otks2/kekorokawumu.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160821a33c55d5---libusu.pdfIn PDF document text
    • http://headrepublic.pl/images/files/31979407953.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/73c6b10c015277926aa1e234547528b1/44285151598.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f66442cbc9---rusemadojageka.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/wotafegebekugefu.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/3i1inq577hs12o3g4j7hhh9hj7/74426419616.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/raravavup.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/57511074510.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/pamudorejewomibigumuwolo.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/61065446216.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/clc4caslphrmotn8is50nidutb/pejefudukawi.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/7mjgaaurir3vlr0ldhs1cfdsd9/12269257179.pdfIn PDF document text
    • http://fygl.net/uploads/file/110159505684.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a274469b6d6---4626003260.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc5aaa9b1e---kedofelu.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/fodinimilalofeluripo.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9633bd903---wogusomewew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=geometric+shapes+formula+pdfPDF 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_off0000d5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CC 10920 bytes
SHA-256: 48793e2aa6cd0684b682304822daf5a7ffa04aa6d363ac714b66aeb4ef137022
font_01_sfnt_off0000ef20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10732 16868 bytes
SHA-256: 680847fe40d8d87b627a1c75c0d5369c938297c8ad7d959def88f56f1bf3191a

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