PDF malware analysis — malicious · 00c77902fac2e3d3

MALICIOUS

PDF

73.1 KB Created: 2021-09-03 20:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: bcda8464cb78bbbcad909a2566558315 SHA-1: f5d7cbc33077271815c39e5e518ecfb05817e81e SHA-256: 00c77902fac2e3d30f4ba224cfac509a4d6e8801f3b285a0f7e64d37b47eb09a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to multiple other PDF files hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of multiple unknown URLs and the nature of the heuristics strongly indicate a malicious document designed to lure users to further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9915

Heuristics 6

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
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://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16101164930f89---futifajazogasusikixema.pdf In PDF document text
- http://indianaquesters.org/clients/9/95/9573c8d6e108c9729a37356986dd5b5e/File/jumujiwisubisixuzajo.pdfIn PDF document text
- http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/3274944930.pdfIn PDF document text
- https://loctra.net/userfiles/file/ridukebasolunasutowuk.pdfIn PDF document text
- http://platypusspot.org/uploads/ckfinder/userfiles/files/jubesuji.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/0d4766b7d0e1f3322f929fd7037f30ad/wafojolozagef.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/stf62i981q6p2qjq5t8mgnm4e5/jotajux.pdfIn PDF document text
- https://xenang-mitsubishi.com/fckupload/file/gafojupaz.pdfIn PDF document text
- http://kutscher-customs.de/gfx/userfiles/files/17698723866.pdfIn PDF document text
- http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/92301845322.pdfIn PDF document text
- https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c5df96c45df---nosew.pdfIn PDF document text
- http://clinicaveterinariagoitese.it/userfiles/files/meropovuzenajafanezoleku.pdfIn PDF document text
- http://homenet-spb.ru/userfiles/file/83927228382.pdfIn PDF document text
- https://migger.dk/userimages/file/31027218828.pdfIn PDF document text
- http://artpolyclinic.com/file/files/kizuwutamebuluvalumij.pdfIn PDF document text
- http://allprintusa.com/admin/images/file/bibijuxiwuzaxawatizoxujid.pdfIn PDF document text
- http://citywideok.com/clients/75789/File/tifatiduxutaxolifum.pdfIn PDF document text
- https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/8447af354debae2a0fe766fb53e6f80d/kepavituroferalugofeze.pdfIn PDF document text
- http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160cad2d6b7345---34110201909.pdfIn PDF document text
- http://cottoneauto.it/userfiles/files/53500069130.pdfIn PDF document text
- https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/b8c9d206d80232a7c7c2f073edd7bfbb/noperosovigadubotasesune.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ac3fc7836---90773304193.pdfIn PDF document text
- https://lwim-ouargla.dz/ar/files/lapotufixisepape.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160839abe4d4a5---63063004076.pdfIn PDF document text
- http://zonweringbelgie.nl/ckfinder/userfiles/files/ginavitumupirer.pdfIn PDF document text
- https://nsck-cykelmotion.dk/userfiles/file/19409327052.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=que+son+las+bacterias+nitrificantes+pdfPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000baab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBAAB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d2c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD2C2	10912 bytes
SHA-256: `5f59bb44ba7c318bfd6f2f0dd3c9bc20f2388dfc7d4d1e0ef76a29b68537c388`
`font_02_sfnt_off0000ec0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC0A	16120 bytes
SHA-256: `18787560f05cb5a09a93072446445e3516e2573950249934cd13157e6b309ee3`

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