Malicious PDF — malware analysis report

Static analysis result for SHA-256 faca302b81075084…

MALICIOUS

PDF

91.0 KB Created: 2021-08-25 13:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dfae3671ee57036f074f1368423c19ab SHA-1: 994f3ec5509fd50d878c37eb8c039a1d2e7d6620 SHA-256: faca302b8107508442de89d9053e1e949475814c1ab86483fccda6381820aa78
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF file contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating an attempt to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely involving the download of a second-stage payload via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7497799752---87006175564.pdf In PDF document text
    • http://logo4you.dk/userfiles/file/50109648480.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd9bc73c14---74448277249.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/kusabagulu.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/14ab7rk7jbl7m4nsclin9bk4hj/newezan.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a47e5182a---pogikunuwiwilosew.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a5dd4b8b2---27671184347.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/cdf4889cb9dbd2cd5a15d120759157b1/1475591852.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/jonexuv.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/6446c7ee36a336ba5d3b9f6fa0585402/mifutokiporowitox.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/qipmo79oog6u6j0ucp6iupbkhb/50092299625.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/60108184760.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/fugekiwimivikoxibabetije.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/rapunotemu.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/pinefujuzezesi.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63d4bd7706---sesotuwodex.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/80410458596.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/787aea9686d0738740404666d7b9373a/puxedepuzuvipibidejut.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1609590428421c---8070100940.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca2cb15c59---86467245689.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/c215264aee3fcb945e97b64de4085962/zulimilig.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/29597622085.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073ff3783fbe---91958443784.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/66963575635.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/32507291615.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/78560124448.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=ielts+reading+sample+questions+and+answersPDF 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_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11588 17508 bytes
SHA-256: c5c9002f2d65dd122fca28cab387181d543dc68465fcbe888c306e18c09a2d82
font_02_sfnt_off00014379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14379 11016 bytes
SHA-256: 70e3d925b609ea14042747f5af01a73cc8a021607b09c961e70636394af83371

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