Malicious PDF — malware analysis report

Static analysis result for SHA-256 366a3849b6dc05fc…

MALICIOUS

PDF

79.6 KB Created: 2021-07-15 10:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a9f4c37cec67c26312bb1404e5c563f8 SHA-1: 82d21bc4908e9fdf029b0cc7e6af9aed4d24f2c7 SHA-256: 366a3849b6dc05fc0287e6bf698ae365c8feb28e4e9f15af1af22ce305ef146f
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely lead to phishing pages or further malware downloads, aiming to deceive users into providing sensitive information or executing malicious code.

Machine Learning

  • Nyx PDF Classifier clean score 0.2244

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=employment+notice+period+meaning PDF link annotation
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085922a14488---kivirubar.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c60b53260ba---72840561872.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24614cad2f---kutotigorenanujaf.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/6581997290.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2b73403eecc3c6996e680ecdd3281264/gajiro.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/41823244225.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/68956734476.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfbd8acf4f---93971653287.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f6e4ec59a---vuvixawuwatepubixijirafuf.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/ca5dd67d44a1e8e26cbf74ec176ef3c9/21153550602.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/96920527971.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/852be0be006044321aa5d10516e8cd11/78147695252.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160939ee05480b---tusunuzilasopaka.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b2a577c91---77009149943.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/72100478181.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/ee0c8b21139c8051c97c2529fa6c1c95/84944379478.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/r473rdg84hcdnv883612g7j61k/21898765155.pdfIn PDF document text
    • https://dm288.com/slicice/file/31230199335.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/faralofomorowale.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/96524974592.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/2f0f4be3d8007359d5761e287c63bbe7/93567532630.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082f15d35766---desesifebojunorepubuveva.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/63717992253.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/f5546709ea48aedde57daa333914cbe7/4913959259.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/1ah7lrda0rmpd7mnc2old4nm7r/sukexalebamapuxe.pdfIn PDF document text
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/24565353609.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/94478832067.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dd97ae920---61256283053.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_off0000ed7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7C 10784 bytes
SHA-256: 751a4b19bf4398aad1f62ff76ce34dac62c425c7323116a3febafb6d5e927ed2
font_01_sfnt_off0001060e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060E 17708 bytes
SHA-256: 84bd4d2dd9cbcbfc7b3d9359f537eac332cffed5500b2b5c9251ce1d3e71550e

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