Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad08ae636911a69…

MALICIOUS

PDF

89.5 KB Created: 2021-07-20 12:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e65275d2f62dd555694a1cc446668cff SHA-1: 16b1368bbc26a617740fa7ad5adda39dd31a945a SHA-256: 7ad08ae636911a6917a18eeccc96257b40a56fe60dcd061e094b63ed76937ca1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9924

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 http://orem.mn/uploads/files/zoligotivufulimid.pdf In PDF document text
    • http://cl-metalparts.com/d/files/75364059322.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160722d5a97687---kurulipubegogexor.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/025162473e3b0241859dbcdf277fca00/tibogurawagesulebarubug.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079fb4645ac8---deluraxexuja.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/54611647528.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/b6902a2c11fce31f4d6cc0cceb3b698b/limukogositesakewopu.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/01d1556692cbf041434df4c6ee30eaeb/88490646228.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/ia1u3v5ihbpbjbfvfpmis10efl/jowapaxerunoninabu.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/sisoladejekew.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c6cc501b6---jetikejoluxi.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb52c734a6---xupekedulasidapebala.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/4da39d862f2a755c9e85fdac762078d1/difim.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/dalipuko.pdfIn PDF document text
    • http://diencohoanghuy.com/media/ftp/file/65020057059.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/tajux.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f47b79a5d2---fujumetamom.pdfIn PDF document text
    • http://womenwhorockarkansas.com/clients/4/4c/4cfcdabbb7b8ad81bafe9a4295858145/File/kekugowuzo.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/vvgi4eve2prmsg7h30mv1b8ufe/dapiwuzejofigozojevupe.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/0debrafjq3sfh1ar8cj4sl6hd4/mefepivisebajuperuxi.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/fepamutumajubolerukuvo.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083120581771---96157716675.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/nesonodopo.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/66991274083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=ps+remote+play+android+apkPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 10760 bytes
SHA-256: 8972a02bd4b9fea22b7846008abffff601fc1a01c71f72b266482ddf56b7570f
font_01_sfnt_off000105b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B0 19416 bytes
SHA-256: f67609c00d5a54a0d4f60e98279ddd4dd6a80ca8351ebb21da28245db4b9a452
font_02_sfnt_off00013821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13821 1696 bytes
SHA-256: 28c5bcedffb0f63c0f18ed07264126f7c833899b916de9a351f9850be7cb6bae
font_03_sfnt_off00014031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14031 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1