Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d7955b7b617550…

MALICIOUS

PDF

77.5 KB Created: 2021-07-18 17:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1806f33ffb9ab8df25e3bdf5e994ba81 SHA-1: bb94e08ad206759e20edf12c2f21b1420f3056ad SHA-256: b7d7955b7b617550c96b372d0996388e4145be9b622176becb8898775e37f3cd
124 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress sites and disposable hosting. ClamAV identified the file as 'Pdf.Phishing.Trojan', indicating a malicious intent to lure users to potentially harmful content. The embedded links suggest an attempt to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3127

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://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c4887293a89---67093089884.pdf In PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/l4g200vnqvqbpu4bhou6ajueiv/ramig.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f450705d7406d909770ee032e942ae3/43628262200.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/zajuwuzirazodejorin.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5386af2e6e---98512717556.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2c7d25c35---zifetebawutekujeseroniz.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/mimovomali.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/53244296023.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5efeb51ab6---24957529654.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/xujonolakukaxatazigukil.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/su4n83tanndp1onub0qj9tceme/fofes.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/gapuvisezafujudibozosomi.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8970d296659370e085ed11c825e21c0b/89576533834.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/wosag.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/dewakij.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021070904355775.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/demedi.pdfIn PDF document text
    • https://bdata.vn/upload/files/zagifagiridazaxenigotib.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087973c5b582---70139149911.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/wuxusad.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160906c4e13f4a---susuluzizujulipugadab.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e71ce223f---moraxodano.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/56662762767.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/23162732860ccddeecbf37.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/97324003176.pdfIn PDF document text
    • https://x-software.cz/data/file/vakuxazorotepafetodifatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=songbooks+pdf+downloadPDF link annotation
    • 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_off0000ecb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CB 10644 bytes
SHA-256: 16a3dc7130315291674e31e4c932bc8b37435e92f961ff630c1fa56a7baf9058