Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b193d9842c966c…

MALICIOUS

PDF

175.8 KB Created: 2021-10-22 21:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: d9b8522c0821a491bb3b83f2017f550e SHA-1: 8cb9c5ecc6125685f146c7b7a78508b2d47ed3ff SHA-256: 14b193d9842c966c411ea5d3a36cf9fc5a70a6f9f3d98c743cd909c7ffc6335a
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised CMS upload directories or disposable hosting domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the link farm structure is a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7344

Heuristics 5

  • 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
  • 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://kppzp.pl/userfiles/file/fezovigasuzifep.pdf In PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142434300dd5---womewulelojebageri.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139da4d0aa4b---25268417060.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/xebudazowewuvijafapoxudo.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408f374af1e---kilegunoruji.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/kofaje.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/12442273485.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/kewipejidobemezatujogebis.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/5450159663.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/eed97e2a6994599508e1dc8b416a7a40/6760989893.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613d87f2afb34---54612752481.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/jodozurulumupusipabumibi.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/vofesabewidezoju.pdfIn PDF document text
    • http://elpijisystem.com/file/bonametirajekezuwepimad.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/55442595546.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/bujubere.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161526085c550b---tavulifuwe.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/d2c3a1631fa53f3e8abc1eba1fb27ea2/91651962610.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616f59fc476c5---dagodurizosawolasir.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613821d614cf5---voxisinajokewir.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/74916959355.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/45410098158.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/82761289378.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/46012501069.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161393821c6d97---35270393046.pdfIn PDF document text
    • http://darec.sk/files/files/jewobavipikoxiroxipopa.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/92791404105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BGAemAmcdTc/uplcv?utm_term=king+henry+eighthPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28320 9996 bytes
SHA-256: 023ce26903e813527468ab73fa2215f2ec8b8e991c33cf9eba7ce9395e95b8b3