PDF malware analysis — malicious · 215092e799d86bec

MALICIOUS

PDF

98.3 KB Created: 2021-08-09 11:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: cccf3e06cbe9ba60d6631032823d08e4 SHA-1: 1fea3b90884313741e37a7131fb2e5196f4a20e4 SHA-256: 215092e799d86bec4f3a0fbc271adca6e925f247dd5f6b9f5f6e216382f7ce29

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable binary data, indicating it does not contain user-facing content but likely serves as a container for the malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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://giadinhlaurenso.org/upload/files/93630285862.pdf In PDF document text
- https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/be47f6dc092ba9bb1309b014ed957bc1/1932486510.pdfIn PDF document text
- http://hiro-seiko.com/upload/files/girudux.pdfIn PDF document text
- https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16082ff070474f---46769738021.pdfIn PDF document text
- https://247christianity.org/fckeditor/userfiles/file/sexokov1625615404.pdfIn PDF document text
- https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ee53f62b---kelimuxigetuzola.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/cff7c0124a78e7c225e5ad03a3da6279/lupebezobegija.pdfIn PDF document text
- https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab699f4ba87---91641568990.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/e1timcauk4qvird7a3fh1jhfs0/21890546316.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91000436f---6600338872.pdfIn PDF document text
- https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/9792e3fd89b5b9c4b835c313b7d59a4c/lejekevijogin.pdfIn PDF document text
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb20985e006---juwuxema.pdfIn PDF document text
- http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160806e67d6387---75588731153.pdfIn PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3b7baad09---6042577210.pdfIn PDF document text
- http://bitite.lv/media/txt/122/file/83938332010.pdfIn PDF document text
- http://fst-uinsu.net/userfiles/files/lexenasujanukixuwuxama.pdfIn PDF document text
- http://cerezolorente.com/files/cerezolorente/_repo/file/96039898654.pdfIn PDF document text
- https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/jhijo3d2imediko1r9ds1thbtv/13293625378.pdfIn PDF document text
- http://spl-designs.com/ckfinder/userfiles/files/xudutofakelifajenatis.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/vkhr2o4kh7v7t4e1moe4d677rg/51381673458.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/s4u66ap1t00t2ci9v5u4oqflr3/22085383901.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085a16250f7a---xonitigukaba.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ejercicios+de+numeros+romanos+5+primaria+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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010365.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10365	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011b7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B7C	10984 bytes
SHA-256: `559e7205ed946db9a6144e86024057b6e03dad84a45bcf61d7e0081f56abed78`
`font_02_sfnt_off000134ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134EE	18576 bytes
SHA-256: `22273c130d4b1493cbd5ea7a75b301cee0942b0bfe04b2be3d64237c00e6a3aa`
`font_03_sfnt_off000164f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x164F8	16068 bytes
SHA-256: `6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d`

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