Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9980257d96019de…

MALICIOUS

PDF

79.8 KB Created: 2021-09-09 23:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 32023f2c1cdd17e5c6101117bab88e6b SHA-1: fe1d757d77f7c0e8c8a63f156cad71127ce821a1 SHA-256: e9980257d96019def68d2a1e46d53d7b4181aa12958e87bb2dd7623178a07fb9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple compromised websites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a327c47b0d---94775507524.pdf In PDF document text
    • http://robwalker.net/fckupload/file/87736296595.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/58595951670.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/aq3mkctrq24h0dp3u1svv873t5/93356247624.pdfIn PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/jajoranosubiwevapesozitib.pdfIn PDF document text
    • http://pronobile.com/catalog/file/41934383395.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202108312254046905.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/82b0bd721abc15f075f36bff17191e49/19009866194.pdfIn PDF document text
    • http://nature-revive.org/files/file/sirujefizepepugad.pdfIn PDF document text
    • http://iscyber.com/userfiles/files/vanuroxiditatotiwo.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/kasap.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/54505173584.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/43725746466.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380a3c06840---zafomusabikuwumipu.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/69255544736.pdfIn PDF document text
    • http://goldmustang.com/files/files/17312386460.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/82529486583.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/50820090590.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/vobiwilowibowus.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/67008696322.pdfIn PDF document text
    • http://020tzs.com/baige/images/userfiles/file/vofuwimafemanipis.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/37538133038.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/43739956599.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/xedojofabenikob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=gogoal+apk+downloadPDF 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_off0000d3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 10196 bytes
SHA-256: 69f6a6363792a2fc6c83eca3532273e03f1d04b68bc3769486770f2fefa7e225
font_02_sfnt_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 18444 bytes
SHA-256: 5c490dca5b88dcd5ea6c0d650dcf7ef06069310310e869adf3e60a2040fd6bbd