Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87f601e3170bd6d…

MALICIOUS

PDF

71.3 KB Created: 2021-09-02 16:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3bfbb9ddf31270209fe4d7f0027420dd SHA-1: 9638d7add1cc8a25d26823a1dfee56494c10c464 SHA-256: d87f601e3170bd6deb4705fd20f046039f6dab801e8c2edb35886d99e7c3dde6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, which flagged it as a phishing trojan. It contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 https://ketchas.ru/uplcv?utm_term=ez+command+control+center+manual PDF link annotation
    • http://lpkgoodframeupvc.com/userfiles/files/nivegikizowoda.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aef360d5a2---loduzusukonobuviwubop.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e969aada9---zezatepajejakefemeki.pdfIn PDF document text
    • https://duvanco.be/docs/files/25131138202.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/83975de4064f138b3fdc1c5fd8c7a4bd/damukalipazileworozaxenid.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/67126810842.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/ace39f3b121e2f3d4b091e52ebb5c6ee/20564315350.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/gamowejasedixakevisad.pdfIn PDF document text
    • http://rozgarnetwork.com/ckfinder/userfiles/files/75229626086.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/miwesamoxagekijisoju.pdfIn PDF document text
    • http://vce34.ru/attachments/file/57785492791.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/f8473b907768e37a7f444fff2c642ffd/gedude.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/24516483763.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/e38a5bab85caf3388359d7f4ca3b4e9d/gagidi.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/045d4720c5a63e6211ed04ed6e81d666/ruxumujejanilulawusejevu.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/7ebdc3fb857795c34c9dd1f1a0adf318/15864534755.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ade894ceeb2---dovag.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/xaguwuwagi.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/kifijatamopogawenodipob.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/75315154756.pdfIn PDF document text
    • https://krossi.ru/images/content/files/33532426063.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/37013800706.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/16072647055.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/sibafebuzexurosigew.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/wenupur.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/90861028108.pdfIn PDF document text
    • https://tessuno.com/upload/files/60d2137045d05.pdfIn 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://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_off0000b7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AE 16024 bytes
SHA-256: 184466e16729118055f0b33e8ffeac8ee25259141331cd6832f4e03e1cf96269
font_01_sfnt_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 10412 bytes
SHA-256: 1997f1ffafb36287f56942a3ba1a969ec010f5d8aff0849ef850c027ebb434e3
font_02_sfnt_off0000f7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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