PDF malware analysis — malicious · c4b4ac3b18cc4456

MALICIOUS

PDF

90.2 KB Created: 2021-07-20 04:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: a2469911a160eec7a4e3849772780563 SHA-1: 213a6b5c2c39497b6ebfe092fcdb6b884ecd6bea SHA-256: c4b4ac3b18cc4456b76f463321e764ddb2c8db484e45d5eee3a52a274231148d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM firings indicates a strong pattern of malicious link distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 https://nmg.lv/img/uploads/files/vuxutarur.pdf In PDF document text
- https://www.myosiaffiliate.com/199trust/img/file/dodejiwezuwapixaza.pdfIn PDF document text
- http://www.majbrno.cz/uploads/files/98332751714.pdfIn PDF document text
- http://fsoa.cn/userfiles/file/84774215802.pdfIn PDF document text
- https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a24e1855f7b---54032163512.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f11f2a1f7c8---wumunalone.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbeddde3465---kubizasigupoja.pdfIn PDF document text
- http://lateonsettay-sachs.org/userfiles/file/joxivaz.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/80qkvesu1pulb9n4i58gid2mb2/93538987279.pdfIn PDF document text
- http://dinskayarealty.ru/media/file/99213487657.pdfIn PDF document text
- http://tofuyatogo.com/uploads/files/ragiko.pdfIn PDF document text
- https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ktp4d2ivii8e388l8aj83s0hvc/wujimi.pdfIn PDF document text
- http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tolatuxef.pdfIn PDF document text
- http://softwarefactory.nl/images/file/fudepigekilagin.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960f3096ac0---ruzavorixumikutusosa.pdfIn PDF document text
- https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d9601424e---rixowodalosovitarofoxu.pdfIn PDF document text
- https://chezgregoire.fr/userfiles/99868724616.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088ec8d05e31---xuxezaraxokawudimevijo.pdfIn PDF document text
- https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/bc350dd9c63c9173af6656ab73f6273c/baduxazulo.pdfIn PDF document text
- https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/e1e90ec23939927d59d6a46354e38375/sujotepajuwenomarodibojo.pdfIn PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/9450595cc6fee135e805ae5a0c7dc3f1/jikepuzofiriribolotinan.pdfIn PDF document text
- http://eugensa.lt/app/webroot/uploads/userfiles/files/zejuzasomagudugulolope.pdfIn PDF document text
- https://cottingham-group.com/cufiles/files/zuzekunimoja.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=competitive+graphics+settings+fortnitePDF link annotation
- https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/127509e7288e7330bee068dba7cbb530/74335765487.pdfIn PDF document text
- 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_off0000fcbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCBB	17388 bytes
SHA-256: `1d95cd732095632a89f259eca5268dfbc0958aa9258ca7d9e4d5ca01db53604c`
`font_01_sfnt_off000129c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129C8	10980 bytes
SHA-256: `477a5742daee693e11dcf4937e4d9e0ea5eb34f2a472e6a37f7898890f6ac00b`
`font_02_sfnt_off0001432d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1432D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.