Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa33fd174df453f4…

MALICIOUS

PDF

83.5 KB Created: 2021-07-25 08:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c2f9f16f798b5cffb68771930fcf83af SHA-1: f718d2afc6252d8e67745a0d0150048c0d04a374 SHA-256: fa33fd174df453f4791916f2785591eeae43762f03ecdb17eda3fc15c515f39c
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised CMS platforms, indicating a potential phishing or malware distribution scheme. The presence of multiple distinct hosts and links suggests an attempt to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6051

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://escritacontabilidade.net/fotos/news/file/famijavave.pdf In PDF document text
    • http://bethanybaptistcolumbus.org/clients/75549/File/78437920734.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/92449221412.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/fafupovavapujupo.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/1f07e59657073926873f93e234793dfa/patevizulovadupog.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f077574b12---5049460149.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/81461119682.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d98a2b52f---wexamebe.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbf00389d2c---63110955959.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/ef1c5c6304830ff7a3f243f265dfcb6f/56778371143.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/palopofagatojedos.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/cf21cf1de5ec73ba5eaec0405ead1053/41014174050.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a036e303173---fojoberozejodafularaget.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/pavuwufejiz.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/21643211395.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c88479112f2---vuxusufekofilut.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607278fc3b085---68762668026.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/19447702887.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608523eb4b74a---tiwuboj.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074b8bbb16be---vumivevikopisomilojot.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/3b056eaaf3046a9ebb981da41f4edb0f/83435445495.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/batawunarojiwipufivam.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908823e0159---dogezapi.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/081574178918571b40f24c55b485a94d/79793044471.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=free+download+sony+vegas+pro+12+full+version+32+bitPDF 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_off000100fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FC 11500 bytes
SHA-256: e91aa0713a1598ce321719566a762e55076ff39c0bc6cfe708cdf7e29724ca3b