Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e232c6f8006fa0b…

MALICIOUS

PDF

74.9 KB Created: 2021-06-11 15:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5e836cf80ffb839cdea358d20f2cd8f1 SHA-1: ca43fe25ce766cee0826105628b8bfffd6ebd55f SHA-256: 9e232c6f8006fa0b1bf990656cf3da37e7c03c2d16e0c33ee18ca6192c5cc7bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or link-farming campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nomylo.ru/uplcv?utm_term=proxy+site+for+redtube PDF link annotation
    • http://php-lounge.de/userfiles/file/ropakupolirovabivawad.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b5533ddc12a---getoxuwotevutixitapisow.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/4bb9fcf93f18fc866f2f7de1234fafe8/tuxidilativowoni.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1d8b09bb85277d92187be6c97121f9d0/putaxeloruvenewikidozup.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090ea7157a23---66950177249.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/321574fe20b7b00bd4e08be726327eca/xuwavakopepirijovux.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/tpvmki7i0svft9uc4rgl5vcp0q/lawubabisi.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebd640e578---61677460948.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/70411dc068518467c66c4fafe27e0982/52026734540.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/nlcn4lqmu3qditqvc7q37j80i8/vamobes.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609482e3026a3---42462123983.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ead368fcdb---70888172494.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4974e257b2---pumadupifiwed.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/mosoxanefuditubovuxefe.pdfIn PDF document text
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/volowovigipi.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16089bd717b21a---vufuxaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 4968 bytes
SHA-256: 8872d105f4c3306c9670e8f5623cdb4dff25e36d63beb0453cdb7c177440ae86
font_01_sfnt_off0000f9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CA 10864 bytes
SHA-256: e69e7aeef440e1d20002016d4d25f735276c00e5cab26621851d3942fe1b6176