Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a779c7cf2b2b63…

MALICIOUS

PDF

87.2 KB Created: 2021-07-08 05:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0c000357e3263c49678871e6b730e9fb SHA-1: 98a3eca8b60247de948665b21c92e11464a19d47 SHA-256: 32a779c7cf2b2b63fbc2206c98fd82cec30c78ab783a28c9d440ad4dbee745c3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of external links indicates a likely intent to download further payloads or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pistant.ru/uplcv?utm_term=acceptance+and+commitment+therapy+supervision PDF link annotation
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/f4f525350924838d85b747c2157e2c4a/vuwusideji.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/nisota.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/fd2c18d84ea5cfa36ed79156a5147e87/tozunaxifugagujirevodu.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/laromigevakuf.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/6683810925.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21841070597.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e7ab67bd5---16142628111.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/b3c1qsiiscc53iq5tgphtr0lo5/nuxufa.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/zulenurobek.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/peduvikebanavinulesom.pdfIn PDF document text
    • http://smiletoursvietnam.com/ckfinder/userfiles/files/malatomigirako.pdfIn PDF document text
    • https://maturana.cl/upload/file/gupapivugofewudinaxokiro.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b18438be44---giporogemegimisezova.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6731ef117---85333618097.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/54188882865.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/riselotelezagikejoja.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4003f76ff4---70356676836.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbda89e66c---juxifaxatuw.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/tomsmqn1qqdb3iks8a8a9m46ih/24428370119.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/0b7cbb706b3b3dfb9a424bde71cf86c6/gufokogavagixakijimoximuf.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_off0000edc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 10992 bytes
SHA-256: f9945ea7e3a513cc2bade23a49039b25e43728b2fdd29f577941eb6798a12d17
font_01_sfnt_off00010726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10726 18912 bytes
SHA-256: aa270dab4e673449d82aa8063613b18dac0d95b280d6910270276d74c6ea4c76
font_02_sfnt_off0001377d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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