Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0e84ee8840a651…

MALICIOUS

PDF

100.9 KB Created: 2021-08-12 08:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 069884060493a6f181fb085c468c18c7 SHA-1: 0b8d063bd4576c19f1a91597aa1f9002c33b4057 SHA-256: 0d0e84ee8840a6518d405606332afb4408367249327b3705eeacbaf14e6b89b1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or lead users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit users via external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 http://agriturismoilnoceto.com/userfiles/files/84563499319.pdf In PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d7d683572---mesolowefewexo.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/37726842604.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16236407456741.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7952b1ea02---60707352856.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/vefaker.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/sopirivijurumegupotupelox.pdfIn PDF document text
    • http://balone.net/_upload/file///4467821424.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608173165b9b8---boxakej.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/7df7cbefad0aaf2be344fce3f216514a/rawezexuge.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/gulazam.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/6605e8c4116351d71971585f3df470b9/74187193450.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/wiwezipafe.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/7f3966a981d0093cf995e8fd971fb450/wakejekefepowi.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/2f3c0427ba8e9ee7faea2a16d808730b/44479667361.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/j7ho1dv5g0ap50v16si8rrb242/13714497119.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/u7fh18uv6tjja1vcsr2sceu6lu/kesulosovegabuwo.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/limawamipavipoxi.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/nifapekepobaxoxadixu.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6317714e05---ligenazaremazawovu.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/74706466311.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/66663347954.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bfee18204f6---62830549704.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0777b5044---24668663802.pdfIn PDF document text
    • http://clasesholandes.com/userfiles/file/86115283858.pdfIn PDF document text
    • https://daks-96.com/f/uploads/files/ligifemekenib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=what+does+creon+symbolize+in+antigonePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C6 25272 bytes
SHA-256: 153dd1e7d6ab17406136df6f47e9a8dd1ea43ee1de2b9a044c589582108bb28f
font_01_sfnt_off000152a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A9 11124 bytes
SHA-256: b86d481b5271715c2657ec9de03872e95d7e5b5934e19ddde24e770e8e556bef
font_02_sfnt_off00016c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1