Malicious PDF — malware analysis report

Static analysis result for SHA-256 588cf07547ab49cb…

MALICIOUS

PDF

66.6 KB Created: 2021-04-07 03:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a171070308f06dfc755e97033384b91d SHA-1: 3fcfc3b2e60e0bfb2d11158c0a37c939e0717e37 SHA-256: 588cf07547ab49cb4ccbe5c3bef99e261f1e4b9c6c77ca0a1508ae40d3a3b1fa
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high concentration on disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8523

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=class+2+amalgam+restoration+pdf PDF link annotation
    • https://mudizuponiwox.weebly.com/uploads/1/3/2/7/132740987/fadut-vewoz.pdfIn PDF document text
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/miwaj-jafib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_5fd29607c4003.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/ashrae_standard_90._1_free.pdfIn PDF document text
    • https://mofumamivuzav.weebly.com/uploads/1/3/1/0/131070192/8f4b19eb55c6ffa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409998/normal_5fff29de5d5ce.pdfIn PDF document text
    • https://xizuxikeg.weebly.com/uploads/1/3/0/7/130740292/73fcd7407.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5fde8a4790457.pdfIn PDF document text
    • http://gezakiribonenin.mywebcommunity.org/affinity_photo_workbook_german.pdfIn PDF document text
    • https://xasevezivim.weebly.com/uploads/1/3/5/3/135302984/taxinivewogewomod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/kubota_bx_2380_specifications.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/55709602139.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/water_jet_cutting_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e1217a-8594-4635-88f2-9b82c4f36fa0/60433999075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d8304d-a345-4d38-b4e4-069f341ec1f3/33499970777.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/2174956110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9729844-cbbb-45be-8a16-2fd9878f6db0/ligowuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b81a28-10ac-48a8-8678-ee0226405c0a/what_does_a_regulatory_compliance_manager_do.pdfIn 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_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 5396 bytes
SHA-256: 3445cf37e9894ea30e58541480cd7d3cc1a46cd8f7a3dd4837cdbcca88faf7a0

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