Malicious PDF — malware analysis report

Static analysis result for SHA-256 095f478544b39733…

MALICIOUS

PDF

72.0 KB Created: 2021-05-28 01:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1c16ac97343cd407f9178d961e61fc1 SHA-1: b84409fbe9bd72ca1a7e3db7b26dcc9905fcbddb SHA-256: 095f478544b39733439835719f28075a6ed1223a2063db10cd5887be7a5a11d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/uplcv?utm_term=project+task+list+template+excel PDF link annotation
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a17935777f4---19080916539.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090f96427ba6---32875699586.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/ruvukeposofotoz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3dd100074---dozusura.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/5f5430cb8ea43dd86bcc5c17ee68ac89/kifomigemak.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a4455e6fe49e63e985364ce34628264/nuditipilesires.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/7be63f128328ed5842c2d9a56cda7ebf/75258939073.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/53682516849.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8fdcec0e1---23208598661.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/di3luuekn8amah3ffh7fbuk8p0/93363251768.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/wodufak.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/63e2236a1eadcd5d93c352b3527e8e8b/31091917683.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/nobezetimelugigefuxaki.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609152bac62e5---dowilajadi.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/1986cd2fe72a2687f289f9be22de98a1/39802487149.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/99596744235.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 5288 bytes
SHA-256: a62247c1347fdcd47cabc4d51c809d84b61e78030feb8682b9e87ef2cdc11e53
font_01_sfnt_off0000e513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE513 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 10924 bytes
SHA-256: b25f5f704e5419d4cac6195ca998b93b531fcdb0f80e6706ae611dacec954e2a