Malicious PDF — malware analysis report

Static analysis result for SHA-256 712e32c33d72228d…

MALICIOUS

PDF

83.5 KB Created: 2021-06-29 00:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0e5f31c25824e07bb9a61a5059c184b7 SHA-1: 97916d02ed5e5fc9f19bbf65ccf3494bfa8768e6 SHA-256: 712e32c33d72228d26c2290e2e5c83b58a29f544ea62039f0f2bb8a0e52c9249
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a social engineering lure, instructing the user to install a browser extension or update, which is a common method for distributing malware or stealing credentials. The document also contains numerous external URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://nomylo.ru/uplcv?utm_term=competition+law+pdf PDF link annotation
    • https://tortugafilms.ca/adminfiles/file/24847481402.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/vesuw.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/nqnhhg7c3q43ldhv2ohko0vc77/sirapug.pdfIn PDF document text
    • http://tfforming.ru/d/files/78234458885.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a42fdf581---92490587344.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/41ppan4b4j00tdbiipracjr5n3/45816179708.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16094cf84088ad---94554291874.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/50779872840.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160971f1b02762---12706479150.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608739563a003---90991992099.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609718fee0fea---16198173773.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/1484ab436950a40ead888c9a5a3feeae/bobonifemukove.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a117750a037---17874019520.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/8596ece52fc0fcb61c48c1807d3698ed/pugixokiku.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/dikavasudufexojubudaw.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/fudesutixitizubobufulik.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/pesilopitu.pdfIn PDF document text
    • http://www.toptehnik.si/images/9649408762.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1b62e2547---20569060725.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/37541164306.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/983ff52f96414978654944593fceda5a/98138955818.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4d15d9348---65535797680.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c5b620bc5---nulasebenapivusexuf.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/61469038483.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_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 17552 bytes
SHA-256: 135f5806b1c71e1421ba14adb77a5fe57e0820759b97e6eedf8b5d9e858a7e57
font_01_sfnt_off0001111c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12933 10508 bytes
SHA-256: e7ac31bf09d06508b9609400d2305bc982622a8e216acb6b72cf156c9e16f35f

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