Malicious PDF — malware analysis report

Static analysis result for SHA-256 9706e8803882d2e5…

MALICIOUS

PDF

179.4 KB Created: 2021-07-18 01:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4cb9d87ea6279cba35afaef6d759e3c5 SHA-1: b9556d7ed44feb7798c1996e40bce9e8e1d00e82 SHA-256: 9706e8803882d2e5d7c7614701624ab4b93ae2050778402858fa7aba8cf39d7a
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous external URIs and link farm heuristics confirms the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/nu8imoqcrhq27d04bii2pg3p1r/92909130567.pdf In PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/kuxumuvelinutomusizesup.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/33477434194.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/gakaj.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/dapomuterujugel.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/b422a4293406fa51c6806150fdd82faa/9726021294.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/50640928487.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078acc693d5e---pefutosurekuf.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089af7b8292b---wemomom.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2f52f11f030697d92c6ff56b4aef004c/tejise.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c43cb85778f---fivamusogidelelu.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/mavexuxelal.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/be5ebcbeb19ce6a6b2a76f7379321953/fejivobawifujunebibesoge.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/a85b50030601103b6e4cbb4aa8fee033/40007273837.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/senaterujujiso.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/99ccf3a1aaccf93b1a1286976b177af4/95032199234.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/60d00a8594e9f4ef87232d73461f1688/69099033087.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/93052262130.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/28895d7e78c5dc4c9be030d812bae2d0/sokenafikuviroruputijip.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/68457961879.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/a5id7ma0rv6091dh05m88g5i5f/28768283131.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/38908089300.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/5ceb8a7b26a9bd4aff59d333f8a0ca4d/18646341039.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078840a47ab4---fojaxemixusi.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/14171100412.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=monster+prom+2nd+termPDF 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_off00025223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25223 10364 bytes
SHA-256: 0c47fe03cbc3b88081f66500553aacd2b439c66a779d81cadd211a133ab84656
font_01_sfnt_off00026998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26998 25880 bytes
SHA-256: f33d3c9bbf9747d1f19a0ef1935b857440cb815800075c62b87b7c7c7bdade2b
font_02_sfnt_off0002a7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A7C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1