PDF malware analysis — malicious · ed7a467b0361cd21

MALICIOUS

PDF

223.8 KB Created: 2021-07-22 07:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 0586e5a8917bb9c42e21d6237fbdfd15 SHA-1: 62fbe446c473b101f4ca402d96f46aacf1845e77 SHA-256: ed7a467b0361cd211a1077df6762c483af90bc8fe730d0aa715c676c997b95ad

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Several URLs point to compromised WordPress sites hosting PDF files, suggesting a link farm designed to distribute malware or facilitate phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9932

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ddd80d977---11545218027.pdf In PDF document text
- https://condicionamentofisico.com/arquivos/file/76523187737.pdfIn PDF document text
- http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/813431169155bd0a6b6a2c74e2626bd7/94549169749.pdfIn PDF document text
- https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/cce9047458bf4c337cb8b669f7660309/nowebamexadobenifok.pdfIn PDF document text
- https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/f4a8976a4b4f25fd7a5ec39618a039c5/romugerigevazedev.pdfIn PDF document text
- https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/2313de53f47acba833ff7de27d1628e4/18196165472.pdfIn PDF document text
- https://hirurgija.me//files/10793972449.pdfIn PDF document text
- http://titibbs.xyz/js/ckfinder/userfiles/files/sizixaxizu.pdfIn PDF document text
- https://gyn-koe70.de/obrazky/file/70832948704.pdfIn PDF document text
- https://tailormade-sales-marketing.com/userfiles/file/7497119195.pdfIn PDF document text
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bb779c9aa97---80638989186.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/79c888bb6c7b20f04af7a45878365d25/96158279819.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bacbd01fa---63122404556.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607284bd097ba---lifibefumavinika.pdfIn PDF document text
- http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085431dd6897---rusikejiponi.pdfIn PDF document text
- https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/09o63au82acver015sek497unn/86950456355.pdfIn PDF document text
- http://aarogyamedico.com/userfiles/file/nadikokemagod.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=standing+female+nude+analysisPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off0002ef51.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2EF51	17544 bytes
SHA-256: `5d2f2ba19a3c03768c56ada37c1d6cd28a3be85395b536a37ce100e18d0c3c18`
`font_01_sfnt_off00030a32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30A32	21868 bytes
SHA-256: `9d8a869dd6705d8ceff0223a4a8f643bc6be950dcd22177668f0cfc7e2bc52ee`
`font_02_sfnt_off0003402d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3402D	10768 bytes
SHA-256: `e21407d4ea39d3ff85230bc76f3fce956b096ef5176acbe69c14b94540ee520f`
`font_03_sfnt_off000358be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x358BE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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