Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c96cf5a76b4dec8…

MALICIOUS

PDF

86.8 KB Created: 2021-07-01 16:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 324d25bd18719b2b16d780b2f000cba7 SHA-1: 9b5f9bc16d3a58e74eca9476eaad983a54ae7fe1 SHA-256: 8c96cf5a76b4dec85a6a5c43b5141b1e4541457748eb4241cdc529b3f1a74c71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/uplcv?utm_term=expanded+marketing+mix PDF link annotation
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fca8e538d5---kirugujonulu.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/5ce5059b33a20070bc576cbf1ef74e22/pupemimapozo.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b929d7c9cec---namebi.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/46833114425.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ksj9rc57nkhs972csrn285q4vd/80041767127.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/58458121186.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/42696366e3073092d6ea9aac5d9b4925/12408971616.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086de2a6e4e6---83881161890.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/33504334129.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/327397c62a71b8984700d39d3afa2d77/27900765138.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/87092679830.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/0b8a6c32dfa3d2a641a41fc22cbf1ee9/sazurajegalobupipimadoza.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/81021370211.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/cb47535b35395e6fd1a2d1f4cb0de128/dizusidazusidinutigix.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/49290867743.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2486eded6---bifuvejojikijazamatoju.pdfIn PDF document text
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/48746075431.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/237396312.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/85813318715.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6165e52390---4998708048.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ac4eb5e6c---73184560677.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/rirubek.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/h72d6spndd84h7iibk4kn2puic/zojumanoxebupobevalejelez.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/xevutefiwiwonidalapotovo.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16097ca7c9e103---gegeponogaj.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909a5fd4446---ponakezavabukogowepelu.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_off0000f2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CC 10576 bytes
SHA-256: d49dc207c88e605351d2f34f1da2ff1cc61e40ed89fab2785c40df879593facf
font_01_sfnt_off00010aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA6 16712 bytes
SHA-256: 70e82cb7b034c04785357bf931cab50ab2df08b4f6377bf5ae5631d32102fe7a
font_02_sfnt_off00013618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13618 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1