PDF malware analysis — malicious · d0cc002883bc9a07

MALICIOUS

PDF

84.7 KB Created: 2021-09-02 03:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: c98341b08d704f71c9f7c2bf6e100007 SHA-1: 856aea778a3346620ce47d16e6ad8f25a6f183bd SHA-256: d0cc002883bc9a075e5b9a58c371d36d986ea23924371af8757eecaf3c56d685

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to multiple compromised WordPress sites, likely to host malicious files. Heuristics indicate it's a link farm on disposable hosting and ClamAV detected it as a phishing trojan. The ML classifier also flagged it with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d4c09b1ef---5832301771.pdf In PDF document text
- http://ranaghatpchsschool.org/userfiles/file/kozegigosamudadotanofag.pdfIn PDF document text
- http://laarakkers.com/ckfinder/userfiles/files/62798625008.pdfIn PDF document text
- https://doellefjelde-mussemarked.dk/images/newsmail/file/vosawule.pdfIn PDF document text
- https://bleikss.com/userfiles/file/12978155577.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/065c08435d28a4924de56d3f2278a921/joruwa.pdfIn PDF document text
- https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/3418b98650432529420bbc16ad6ee6cf/wowesuratanevawumisadam.pdfIn PDF document text
- http://deforma.it/userfiles/files/zuwomidor.pdfIn PDF document text
- http://samsunyapi.com/userfiles/files/wugomagitulura.pdfIn PDF document text
- http://sunwisechem.com/Uploadfiles/files/39429451118.pdfIn PDF document text
- https://lamthong-marchph.com/piceditor/file/24791981341.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608be75a05b02---zimariliwaw.pdfIn PDF document text
- https://grup-insaat.com/userfiles/file/25519520642.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a6ae3440d5e19d02285f6ca6947fc4d1/5420580155.pdfIn PDF document text
- https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/rfog4pbup4it4jike3h6gs6qe1/76448216612.pdfIn PDF document text
- http://longthinhphat.net/uploads/files/lufizipoginogijaxilena.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/a3ee6c41d8cf6ab4540392b01840c4ed/99813095777.pdfIn PDF document text
- https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/48569594615.pdfIn PDF document text
- http://dmhfamilyreunion.com/clients/4/44/44eff64e497b984d8b2945277059c9c0/File/96981108785.pdfIn PDF document text
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/r8oupfro7elj40ln8b0gaa4mrq/73647606923.pdfIn PDF document text
- https://skvely-kup.cz/files/file/pozesixoxeze.pdfIn PDF document text
- http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075346b7a854---pevapudijodiwojobefipaja.pdfIn PDF document text
- https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/6b4b48b81f5c592f476beaa0b9ea6dd5/wimajurasufazedife.pdfIn PDF document text
- https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/42732747760.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/71e7c4e18f603426158f41aef28e2a4c/8732811448.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=directed+and+undirected+graphPDF 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_off0000e306.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE306	19096 bytes
SHA-256: `ab82f81dbdc828052b98960578e5faed3259527b97e4f99d369b34f9af6e3659`
`font_01_sfnt_off000114d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114D9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012cf0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CF0	10560 bytes
SHA-256: `abb120eb23fa8e39a162ea9c430f29cc7f5e3e4612af9704648ef732250412c6`

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