Malicious PDF — malware analysis report

Static analysis result for SHA-256 943603a212bab190…

MALICIOUS

PDF

94.8 KB Created: 2021-07-08 07:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b4c80e4a4c9176e799a67e34f69ca07 SHA-1: 20f0f77ea1d78a02dcd94662037c0aa901e0ab67 SHA-256: 943603a212bab1902c3a0bc0d915e862511ffe1480c78b5ac937406e2f4143ab
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal a link farm strategy, with numerous embedded URLs pointing to compromised WordPress sites and potentially disposable hosting. These links are likely designed to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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 https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/mf2bu0ioiiq3es38ms3d34u844/83162272509.pdf
    • https://iword.de/userfiles/file/daguberajav.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160baab6fe69ff---91264150911.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/18ffb4532f8b4f2608e46a72013db417/34082851059.pdf
    • http://jnnycc.org/userfiles/file/52157358273.pdf
    • http://bahattinburyan.com/userfiles/file/38120204968.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094084d5b5d0---lirimukeru.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c12bf38fe---giwujusesi.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d356b359ec---66303563684.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/9o5jneg60ajenb6fcp0c9b8cmj/tikiron.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae49bbb513---bavogelazeduj.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0031705408---fimomonut.pdf
    • https://fobh.net/userfiles/files/ruwuvovamox.pdf
    • http://a-kamen.com/userfiles/file/15729489906.pdf
    • http://axwelindia.com/uploads/pefebokofurafokipaxab.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/8799a4eb959fc1dab722d990847dcd52/vazopewol.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e36f9a869---rakabe.pdf
    • http://logansport1971.com/clients/4/42/424235dfd0fdcd2d3cc2afd1e16bb83e/File/jenijazizopusajezivitew.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a993e727e36---17929238911.pdf
    • https://desense.eu/uploads/wysiwyg/files/55199832413.pdf
    • https://maydangson.com/vietkiendo/upload/file/28078652753.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/cca5721262540ba341a1a8f8107f7b8a/98461976416.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c5bf37ea8---90098652049.pdf
    • https://stef-nancy.fr/upload/document/gevaxatarawulubixaxuluk.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=golf+in+the+kingdom+2010
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 16792 bytes
font_01_sfnt_off00012680.bin
750b135f285b3aaa71f3810f9f67fc3df63417f4cdc6621ad8e706316f9f7458
pdf-font-stream PDF embedded font (sfnt) at offset 0x12680 17852 bytes
font_02_sfnt_off0001553a.bin
f584873dfaad19154e46b4430724b276c4f58a5f758023aa208156dd1fec1a41
pdf-font-stream PDF embedded font (sfnt) at offset 0x1553A 10796 bytes