Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a71adc6fd6d8368…

MALICIOUS

PDF

60.6 KB Created: 2021-08-27 07:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4fabc9c16ea924dc947d25d747ffa8c2 SHA-1: 3ae8d9e76146ee50cb5f98d83e54341c0d5c69cf SHA-256: 8a71adc6fd6d836882ab70536f38fec91d4c60794ba9bdd2e22889f777bb8eae
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. The file's structure and numerous external links suggest it's intended to lure users to malicious sites, likely as part of a phishing campaign or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6766

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://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c77c2926023---mejozigoturetetusa.pdf In PDF document text
    • http://kahasat.cz/data/file/77264901142.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/89485730822.pdfIn PDF document text
    • http://dytac.hk/userfiles/vimemawal.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/rakogumulepijinolikiwul.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a846703c33a---jevodud.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b838d662d8c---luwogigefavijufux.pdfIn PDF document text
    • https://best-label.com/upload/files/favazalivixubuded.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/govajutenufevunot.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160863dfea7988---bisejoxivolimasag.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c5ded2d56---kabomoloka.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/c5d54dc2f8d201455380b169d8a9367e/19025641830.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/j7ot6jbirc157opva5srqi1666/73253289762.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/quplj19thikms6edbj3lka0isb/52184993135.pdfIn PDF document text
    • http://dothi.info/images/files/56466443876.pdfIn PDF document text
    • http://abpaluso.com/upload/file/14225027316.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/161215cdf6366c---66618471128.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/f4ca32eb02c039f904fc39fd3d5f72a2/zofugozipisoked.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/nesigerunagulig.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a45f2cacd2---50804043430.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/xoxateti.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c3f74639d---rusuzopaxufipep.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/73e293baa1665b3cc393ddd8aa4dc27e/75133704046.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e102aebe05---xazivix.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04aeabc0bb---34252373197.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/gipisibudofelap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=fnaf+free+play+no+download+unblockedPDF 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_off0000d724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 10764 bytes
SHA-256: 1015f587b21410bc50e35698b7aa059c59b4441339568d627a50709c4b0dd6d8