Malicious PDF — malware analysis report

Static analysis result for SHA-256 7342a3d64f43eea3…

MALICIOUS

PDF

88.5 KB Created: 2021-07-02 11:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cf939b3b5df2225d3d7e802126ee2a6f SHA-1: ce88181767fa4460652eea1efb24c03ef4d8accd SHA-256: 7342a3d64f43eea3a7c6615ac5c7ff16ad5a80107e9e232f61f1f6ec14544118
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. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The file's structure as a link farm indicates it is likely used to direct users to malicious websites, potentially for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4575

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://primax.fr/wp-content/plugins/super-forms/uploads/php/files/k9gbc3re7ive7jl5spa93ie536/vubodesulibalasujutoperud.pdf In PDF document text
    • http://china-zzld.com/uploadfile/file///2021060113421776.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077cf1217102---93205146299.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/1888f7e959f76db4d8f2d69d6768021b/55317865464.pdfIn PDF document text
    • https://europartner2.pl/uploads/12428718703.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/d00ef7fd9547e556b54948b4b1a32f0b/nuzevazum.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/54f2744e9f5de9590d403dc5e5bb635b/gutabo.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/zagezomarutasi.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/fowilopiviwu.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfdca4331a---35411498417.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef7a704f32---taraburasigej.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec82550b86---6088435434.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/b3ba71490665226ab6e063927979c3bd/4298419309.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/13770941160.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/kawulutuvibajij.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/44cf9a5e5949e0d151168da61c29a274/59683839646.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/21526993968.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/zudazetojina.pdfIn PDF document text
    • https://atl-50.com/files/file/34153206299.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a43c04337a1---nenarusizogezer.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160703ef6378fe---79419403615.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/bedubunowevixesaxede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=dr+david+jeremiah+radio+broadcast+archivesPDF 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_off0001194f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13166 10820 bytes
SHA-256: edd1f10b86db78e9bae6ebb09950fe89967cf248c8f05890207fc830b0f842b8

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