Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32d5a4f0649f8dd…

MALICIOUS

PDF

71.2 KB Created: 2021-07-21 00:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1e1b2232c99fd7ddc9574aa8ed9bf0a6 SHA-1: f9adf0dedb94bca8477f6107a19292e439e43d8c SHA-256: b32d5a4f0649f8ddeeee89d2c21f194372ba310e2aa6878995d7ab2aa787dd4d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains numerous links pointing to compromised websites, suggesting it's part of a phishing campaign or a distribution point for further malware. The presence of multiple links on disposable or compromised hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/du23a7115ela5m3hgjs0l2n8hq/watunekirutofit.pdf In PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/3icmn3tpkqji7dkn543hobgr7j/tewexasikarufe.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/e7ff4b290d1e1f474c96e9c676094970/bametatonirixuti.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210608002105.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/rudubotapumofip.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/26702633098.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/1888831800.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/h1qjjbmnpjofcqneqr9gj84cf5/29456666423.pdfIn PDF document text
    • http://burrburroughsfamily.com/clients/55468/File/94103811875.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/ruzela.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5725b2318c9f3c337da6b8e9bda37430/94993587076.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/20a015af806b69d8e65de573a3423683/87981155083.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/mujek.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/68590969023.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/21672dc4947c91182b5e0ce00d4e089f/16672768079.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b433bb04329---fogowofote.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/54950701562.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/jisuketogimupolusijutu.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081317dcb07f---gupenig.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/gojesidujesadebunexapolu.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4090048fcf605e792f3fce685646f002/59841123006.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/9062643730.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/d79d667f9al3dejn809b7a4uc0/wexorumasivise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+convert+pdf+to+docx+filePDF 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_off0000b738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB738 15780 bytes
SHA-256: cabde5e10b30eda90d2f1d298430f60e78e7fc69b68933aec31b865b48f07653
font_01_sfnt_off0000dfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA1 10528 bytes
SHA-256: 623426cbe2450c185ea0777767ffe9f5f8a57fcccf55ba7b58a9ad952f65bf77
font_02_sfnt_off0000f7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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