Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d5fe1fdd6aedd0…

MALICIOUS

PDF

70.1 KB Created: 2021-07-18 16:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d6dc5ee948bf5ae38b018f3d92c2ba1a SHA-1: 6b3180154bba969b6f767109b76a68f4653d9c07 SHA-256: c0d5fe1fdd6aedd0bc4eb022974aab2f09384708875882b2a9f1bb55ff9fc0c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that redirect to various external sites. Several of these URLs point to compromised WordPress upload directories, suggesting a tactic to host malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://cuatro-pr.org/sites/default/files/file/wabuzemakojipoxonow.pdf In PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/agucj14trn9nal9of0rmo5kmr1/gejajudugatikojozus.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/f77103212f8addbe9603a85ef055052b/lajuwesozameseduzojok.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaff6e8f87---16986397040.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/85239729397.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/49832076906.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/kufirurujufujolalikaf.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bdb65feed---92937077482.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/51798906397.pdfIn PDF document text
    • https://codecs.roimages/file/runuruli.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/307465e461fe196f3ed9307f1333e85c/dozusu.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160f021fc66762---63161824346.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/79832230344.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/42338607224.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/lodot.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e78027bff---18508541990.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/jujawunadebawusupinesof.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/6f460989055fec9cdd9bf23a3bf1fcc3/22973623428.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/37ebc8013be2a4fbe26cba443e1d4d41/30368759032.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/3ecb6686a3dea8bb44cb5f8b4d3c2dd1/33725437616.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/16004014108.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/47f60fb51cfcf49b2acd19380adef87f/87377890278.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+end+of+insurance+as+we+know+it+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_off0000b483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB483 14724 bytes
SHA-256: de4f72750a0208d31569fa583fa48cb4343c174484dddb498e8b0c778bc2f2ed
font_01_sfnt_off0000d9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D3 10912 bytes
SHA-256: 818b8bd3ca3dd77910f0ce2c5d4f5ff79e5b20d6ef45bf6ad00d1decdf335c02

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