Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed733cd3af0d705…

MALICIOUS

PDF

92.6 KB Created: 2021-08-08 12:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 3ced59e5839189179eb5652b477983f7 SHA-1: c5b84c4014c4e64123142837b9e99ceb14d795c9 SHA-256: 6ed733cd3af0d705576869dc07b1496146d6fa1cff497a32e34cdc48965359ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farms suggests an attempt to obscure the ultimate destination and potentially evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/322b2507e61a14561e175d514f749367/lalagixademawij.pdf In PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/mejonipuxux.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607046b81ffc4---nozukojuxegevolowowob.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/30957916779.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/lolatifubilotalefezu.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/53v2k6pre8lirvvjklvgeap055/tusiwapafikovo.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/21254612416.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/34970182163.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/928ce9a68aa1dd7daacb2e62068bcfd5/77339984087.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/52337772373.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/00afe6488e5812dce0521573c3bd2bca/tugepenuleku.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/131216586069.pdfIn PDF document text
    • https://anfauglir.com/images/file/junekitemaf.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/d49f5683ba5f682efd6d922f2c655deb/3875121971.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607259eaafb0c---jiteninitomipigefetunal.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/c152bc7e9ae16e71c9eba92c6a24bd47/5510361206.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/rajijozinepekomolubiru.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/niranitutoz.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/79830485290.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160945cd638000---tigarupovipilusonoga.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/25572479936.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/15075225345.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/72871839342.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/amuhm1o4dkflfpu1fifmgv8pd5/buruvuvujaj.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/3a0aaf34172cdcc6fafa751ed1452424/luwikerofexum.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2d52c85a68bca1cb4d9884f81824869d/sagejisufo.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/18aokk41nd2vbqah2sobcjt4vg/gulogewefoxusaputorite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=discord+gaming+servers+fortnitePDF 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_off000105d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 17404 bytes
SHA-256: f8178f780ab976d2c1162911991a477a879305e662171cc77e5e1915e8e0490d
font_01_sfnt_off0001333d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B54 10840 bytes
SHA-256: 5798ef648ed8bb229bddbfff993c23ef02b28dccf7dc84148b4284b50df51a69