Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1d3c222ea32e3f…

MALICIOUS

PDF

76.2 KB Created: 2021-08-09 09:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 41f293eec622e278bddbb57e98edffb4 SHA-1: 72cc3d5685702481398e7a6a7f6a54d63a03e3ac SHA-256: ca1d3c222ea32e3f4f1b71f22428678507a8c67eecaaef68298d3e1860ae2fee
154 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs that point to compromised WordPress sites and other domains, likely serving as lures for phishing or malware distribution. The presence of these links suggests an attempt to redirect users to malicious content, potentially for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8951

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 https://oniceh.ru/uplcv?utm_term=kinemaster+pro+chroma+key+apk+download+free PDF link annotation
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11c7dacbcf---64719295241.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/wukegolobujixuru.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/guguvevufitexuviz.pdfIn PDF document text
    • http://mopron.ru/upload/files/87270118951.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0efc23024---11782662708.pdfIn PDF document text
    • http://sireny.net/share/files/radomonisakawurerigomo.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/796938537.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/7133902128.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/lagawewawojipoxolu.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160976d5e20211---jimaduxuvo.pdfIn PDF document text
    • http://dgjst.com/upfile/file/zogudidekepirirexaviga.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/gaxok.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c8ad52e6a---21775376090.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/542bb4827b7ddea11ec90c669c72e619/nitalezevubejoxejali.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c1c24d29d8c---28864041462.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/wotafodikezapi.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/vufuvixorubelif.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609452470569d---56149399079.pdfIn PDF document text
    • https://alutat.com/data/file/11044873060.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/df7b17c856bd0fc635d709ca1ae8aee5/20744411628.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/poxomugovutoduv.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/77328643793.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/pumoxurudonetewidim.pdfIn PDF document text
    • http://jngf.cn/files/file/31510297609.pdfIn PDF document text
    • http://foodchemsino.com/d/files/23656609427.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDB 17076 bytes
SHA-256: b12cc7a2e79c03cefbdf6ddcb45322c24a71d62daeeea5a4455b284ca5c5c525
font_01_sfnt_off000118a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A9 11168 bytes
SHA-256: 87924480c61d496788204386df6c9051d896c1096c2ee720efaa78b16510563b