Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e010ca541abb2eb…

MALICIOUS

PDF

114.4 KB Created: 2021-08-10 05:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 691347b0b6f841afc5b39281547ef5c4 SHA-1: d3655fb490b4257616006511629ed76c16d5c348 SHA-256: 9e010ca541abb2eb97ae96704955c40520a55a9aa572a266cf088d2ffa6804e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing sites. The structure suggests a link farm designed to distribute traffic across multiple compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4c77afd3f---rajitupozipog.pdf In PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bec44352c6---16618681330.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/winojor.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f24560b540a---22898055795.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/wikep.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bdbbe15aa---81072619993.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/161044d622b0a5---sabibepefem.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c90da5f6ef---59087416516.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608123094128f---vozebotijixa.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/bocno4vcuia73oflufgpiq0fbm/jipiwegidebeme.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/oqgjfsaipthm2q3v90kicn2gf9/voxesagi.pdfIn PDF document text
    • http://kelvista.lt/images/files/bivuripogid.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b94140926---lolojutarenosexip.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/vikomavedemu.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16238da764---49161025406.pdfIn PDF document text
    • http://isvpro.com/custom/files/29729058103.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb72f25933---8306808844.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/13555578864.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/92e536f9307a9878e501d99521196b28/72805730916.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16072f9ef587e8---kamal.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4423affd2---gavifazijuloxaz.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/30374983530.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf26642ce2---girawudu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=4+corner+hustlers+symbolsPDF 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_off00015940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15940 10576 bytes
SHA-256: 8aef9e1c428a6c7c57c9b6578d8b813d8413c307b7ac95052a8eed75ee512263
font_01_sfnt_off00017143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17143 19120 bytes
SHA-256: a00e11c32a3c3e856f66c80c9a3b422256dacc296a86f671dceeaedf313c1114
font_02_sfnt_off0001a382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A382 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.