Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e333e474155315…

MALICIOUS

PDF

87.3 KB Created: 2021-06-09 06:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a9e38211b54f8305075980ba754d2a0b SHA-1: 653585bbb9a070feedd9c3c9693d1a57d2caf21f SHA-256: 47e333e4741553150b547aeb4e590f69c307e0f2b828f057d7dddc33b9ea5466
154 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous links to compromised WordPress sites, suggesting a link farm used to distribute further malicious content. The document body, though heavily obfuscated, appears to be a lure related to a lease assignment form, aiming to trick users into downloading the embedded malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9583

Heuristics 5

  • 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
  • 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://laborke.ru/uplcv?utm_term=assignment+of+lease+to+new+owner+form PDF link annotation
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/cr6552sjtkcq38a6aat1hho227/jusoxelo.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16080da41742fb---73214368196.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/lemeturudavavopifaxas.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/1d3bda5ffceb3155d08c3333b2cf2089/witoro.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/18462501758.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c20b75171---13261216331.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfd8c7fd9a---kivabupenadoxu.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/dfu0mfq0or2o50mkns7f2oguh0/38011703862.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/qaqdps0l4fhvfshlcmb3n7odch/vizuteve.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd967907eaf---70934989461.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/u3se3jbaa21l1d6c5731c1m6p2/wutusupudave.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/6d8094784f5af7ff778f35e002d4533c/28169292993.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16099b463315f9---57698695695.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb848e1ba---komikag.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/cd354c65983b06488abc3d72e4548c6d/65318764904.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/80e1f4eefeca07dbd4138d249a42b17a/gigobawu.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16094afe94bbb3---xonemizarirowutikobilelus.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ob6uol2udv2gb9tmsd5tt29t5g/41590255956.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001242f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242F 4956 bytes
SHA-256: 71ded3af9b617f743daf909c428621960ba55d1141366c07cf51e4c9956baa08

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