Malicious PDF — malware analysis report

Static analysis result for SHA-256 083fc3aeed510ca7…

MALICIOUS

PDF

80.4 KB Created: 2021-06-29 22:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 597ad29e7852a3435ddb02de3b206406 SHA-1: dc59c8620b6808e3493c5165c14a08f8699c42bd SHA-256: 083fc3aeed510ca7b7f97b77ed47b2e0db4d268efece989939fdc8cce6b07207
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document functions as a link farm, containing numerous links to external websites, many of which are hosted on compromised CMS upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, and the document body was unreadable, but the heuristic firings and URL analysis are sufficient to assess its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/77ec21041ca6ec76941337483f398f0a/78744816371.pdf In PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9aaf37c1ff9e8fdad0e7a8656801a273/34296333445.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/viwojedobaliluzazulen.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089062ad3d54---81467376460.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/kewelizovifunogubop.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928cc4dc971---62252474331.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d2a60faef---wepux.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/afbfba569d3905c6de8bb4929dbfe7b8/renikoduvixaz.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a39549ee2e7---40807244218.pdfIn PDF document text
    • http://staropolski.net/Upload/file/20897319596.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/3uif0hu54qnt2n20ilq0mji6ho/sugujifaruxikaxaxa.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/46064977759.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bd04cf1dd---58089650974.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/27btahia0c4na56um9r09enqv4/58929091966.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/pedijetemulixamu.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/52ab54ebf4569f1165819c70dbefaacf/diboxemir.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/31464985584.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/d74defb6e8d734aa67d851087a36a587/36521743909.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/rubuwa.pdfIn PDF document text
    • http://vce34.ru/attachments/file/rosudebivobemevif.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16076d16763eb4---110804171.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a567ebf4a3---36382665887.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a965f71f2dc---nagolugizavofozirawanajoz.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968fdc56b53---kibaji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=football+live+streaming+websites+list+freePDF 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_off000104b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCB 10828 bytes
SHA-256: 977a6e8b2a419ea2090672c1a98dfdbcb82a259a36d277ee5471f43f39ea26c7

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