Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeeb8c8dd7cdb15f…

MALICIOUS

PDF

82.9 KB Created: 2021-08-14 01:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: a5acd0995c51a9f8b1cad41e4765eebe SHA-1: 24e72457af511fe354b5ba42081a2743f84c9c05 SHA-256: eeeb8c8dd7cdb15f23aaaa4aab5841f6af9a1bd9957eb2aa8a92ced0626937f2
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 0.9987

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://laborke.ru/uplcv?utm_term=how+to+program+a+gate+remote+centurion+d5+evo PDF link annotation
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078c37b384ca---rulanegoduwiwiduwuzapifaz.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/tolarudufomunosotomunuju.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58e4085f8f---pebezilobaji.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/toniza.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070331a54c45---nisuxonitaxir.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/foxaxuxifuzuxazes.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/valiwadekekiwororuja.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608477921cf09---dowarero.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160924e4f0edd0---59597280350.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b946baf63---bevujaziso.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8c0fad326---xotukaxukagirevixozalolox.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tidereketowetabuwotexa.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/abca95335d37e998e6b3802f8d76b5e3/vanuxo.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/43172763352.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/8cd576ffb03720306aa02df7a5b86173/64047066447.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/45754859362.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/6160384255.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/2a8bade6797cbba2ef470c1d7a7c3a95/sovomeluxefoxefudokaj.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/ee202762edaedd3c8f02bb33647e3cf5/38898520903.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608101cc80c7f---zagexebamaralijabaj.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72112635429.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/34509622e76712d5def69e1111d62511/gezaxejivese.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/ac188dfb34aab750c10cfa1a26121c29/87273986020.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/vudebeferolusakune.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16096b2c94f1b3---toturezomadisa.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_off0000d70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70D 11020 bytes
SHA-256: 828ca36cf66eb81a2586d3b6a549435173daa55e1ce74db0c13e0f409455ef56
font_01_sfnt_off0000f089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 19660 bytes
SHA-256: e00ade7124d81e2e5bd7622344c950c568ee8d109f497f3f69e7978d6117ce9c
font_02_sfnt_off0001230d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1