Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ca1433ebea85f3…

MALICIOUS

PDF

66.5 KB Created: 2021-09-05 06:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d847cb4bd1802601dea13a5d63933038 SHA-1: bde4da11df772fc3a83376ec5fb45f7a37222197 SHA-256: 49ca1433ebea85f3b1ef76281309ee2f19b3975588bbbc8b92f02c40019ffa89
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the ultimate destination. The presence of embedded URLs and the nature of the heuristics suggest the document is intended to redirect users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9148

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://crewmak.ru/uplcv?utm_term=function+and+relation+pdf+download PDF link annotation
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/e1c62fa8ef7f5d61f8667127a5a58569/gevuwepod.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/63846237184.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/646653439611c5a39763c9.pdfIn PDF document text
    • http://perfect-gallery.com/userfiles/file/kakimoxate.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/1350832121.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/69672849460.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/81163262613.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607def881fef7---49316053430.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/8874334551.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202108250914541680.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160982d9032466---95494783587.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/a7e87e432a27a43394510d5609a68231/gewumivosuve.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/manewilemutamarotaw.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/xabibobaniguwixipowenuv.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/18411437918.pdfIn PDF document text
    • http://schmetterlingsgaerten.de/file/nugerodugozizokabapises.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160859d6311109---vozuwipavu.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/b2b7a631a235ebba1740c31a08d65390/47357099206.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abcdd39bd2---xiwedosijopalosajokimum.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160907d0949bc3---pizojinu.pdfIn PDF document text
    • http://gumberryoleschool.com/clients/33891/File/doxupazamew.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d68eccf830---pedokobeti.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f206341b0---mivavalowigox.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/5183943373.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_off0000dcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 10608 bytes
SHA-256: 92a885c3b6fdbbfa72f0ce0e064ff5d44be43dfceea79b802058bb9ee22339ac