PDF malware analysis — malicious · 7cb261e3dc12ea7a

MALICIOUS

PDF

81.7 KB Created: 2021-09-05 23:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2993fb7c7451b3c34cf3d8ae295b90e8 SHA-1: 784faeb3f64c12330abb8133cdb11589c0d9ecd1 SHA-256: 7cb261e3dc12ea7a511f65692111d39e6da532fa50a72ef557636a73d66dc6ff

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c98c47ee8---pumetizixipagozawax.pdf In PDF document text
- https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ngpgh7qn2s6e57vkttih8k9e10/48206997417.pdfIn PDF document text
- http://e-skala.pl/userfiles/file/73918928858.pdfIn PDF document text
- https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/561u2ff863a5smmfhjfj162pct/konuwozegadules.pdfIn PDF document text
- https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/97d020157c3f7a37183e36bb8346e896/87626024437.pdfIn PDF document text
- http://www.cenlajobinator.com/siteuploads/editorimg/file/9984308532.pdfIn PDF document text
- https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/577860a1cb2e153ded01b34da32130bf/52360043748.pdfIn PDF document text
- http://stopguepes72.fr/userfiles/file/denuzufakame.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/14c5a4104161fed6175409c1a9a027cc/18828231912.pdfIn PDF document text
- http://abwcoliseum.com/uploads/files/dutefetuna.pdfIn PDF document text
- https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/jplecpjn16t6ipsh8uf60fbhtf/wotezemaraxedozuwo.pdfIn PDF document text
- http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/98161014334.pdfIn PDF document text
- https://cmetrix.net/ckfinder/userfiles/files/zamevolewitix.pdfIn PDF document text
- http://partnercable.hu/files/15055175653.pdfIn PDF document text
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/134af01cb8c4269fcff96dbfa25845af/pemilokiribatubeferopawo.pdfIn PDF document text
- https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/9a797ee2793020a00c7c140e0158bb35/zufin.pdfIn PDF document text
- http://vetusmeter.com/images/upload/File/2025003009.pdfIn PDF document text
- http://vijyaiprismcrm.com/userfiles/files/gedigewuwat.pdfIn PDF document text
- http://barcabianca.eu/upload/file/2031580421.pdfIn PDF document text
- http://broadviewlibrary.org/uploaded_bvlib/file/78131250580.pdfIn PDF document text
- http://theonejsc.com/userfiles/file/narup.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091fb27bd55d---dapumidunoguwevukeratin.pdfIn PDF document text
- https://divinenine.net/userfiles/file/62055118447.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=gramatica+sucinta+de+la+lengua+alemana+pdf+gratisPDF 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_off0000d56c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD56C	18808 bytes
SHA-256: `b389ed4820ff80723cbbf10ccfb685f9ae45c127c1917e3f9f82d971ebc07b25`
`font_01_sfnt_off000105a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105A5	10984 bytes
SHA-256: `bd07dd36b80eef6fc85a0ba28553062443b1fb086d678e4d76b89bb9b6cc4503`
`font_02_sfnt_off00011ef6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EF6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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