Malicious PDF — malware analysis report

Static analysis result for SHA-256 4026fae1f6a4866c…

MALICIOUS

PDF

69.2 KB Created: 2021-09-08 10:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a5047fb7d45e8104d0b8cd405b768514 SHA-1: 582e5c99e83daed6c7d644270054431fe3801f15 SHA-256: 4026fae1f6a4866c98b3f1c867a30f0afb50210d7dcc961ee162e11d66cecd77
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised WordPress uploads or disposable domains. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7758

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://hagelkonzept.de/userfiles/file/wibixoxovifuxelijiwixak.pdf In PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/35546382528.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/tozusezamuka.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/620bcb1b1d752a18b7775d3aa12851e8/38976294884.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/nefur.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160729e946e94a---mazozurobudaxejax.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/4252259071.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/bubujorenep.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d22484b786c---44357704187.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b62948a4b6e---nazirijepevadeselikokaj.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/64168736408.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents//files/67563616097.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd80b48910---vetesavopusewabov.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/mubimoz.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/24318522957.pdfIn PDF document text
    • http://zaiger.ru/img/file/31872686894.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/zerunabazudetubox.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608200cbc4b82---48953311088.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/22715563762.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b985742a358---kakunabujotujejerikunubu.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/lufibonutujedibejatapaxiw.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/guputakosixojivawukejil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=astable+multivibrator+using+ic+555+pdfPDF 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_off0000da0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0C 11384 bytes
SHA-256: e52d7a808997cefe137e7474a19a6dd4f2619ea49a1f6b63c7f5d0081ba9bbf8

Open this report in the interactive analyzer, or submit your own file for analysis.