PDF malware analysis — malicious · 1dc417ce45160cd2

MALICIOUS

PDF

80.2 KB Created: 2021-08-13 20:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: b44820d32d6e583b13bc631ea6384300 SHA-1: 0324f475785192abd6602158b1ff7b6d28d0f908 SHA-256: 1dc417ce45160cd20aaf3a8abcd3b64583e200b690db6a6e12435eb4360000b0

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.7117

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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
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://crysiq.ru/uplcv?utm_term=english+grammar+activities+for+class+3 PDF link annotation
- http://www.motionmantra.com/userfiles/files/xabulejalesolapujene.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/mi99ba26e0bp19ulrdo38uruhh/badawumazo.pdfIn PDF document text
- https://liur-krd.ru/userfiles/file/sorezol.pdfIn PDF document text
- http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56439323895.pdfIn PDF document text
- https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/92fcc61598db01034b697c1d890f93b9/vutedibamiterolof.pdfIn PDF document text
- https://delphin-bau.com/ckfinder/upload/files/24924991562.pdfIn PDF document text
- https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/0pcrtuqu82uutfiu6ufd5d0v5c/32529131839.pdfIn PDF document text
- http://driscollandgibson.com/images/edit_images/file/betijode.pdfIn PDF document text
- https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/18qr2e1mpsnha52takma2jsq73/rosuzifamumotupevutud.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/740dc443349260e70e5bbccc3313deed/ramakilo.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/jo0g4l0smkne4d5cg6unpimk8s/90335876580.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1de16703f---30311793409.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/cc5a77e316fa0c019af758efb2729813/93103430568.pdfIn PDF document text
- http://nfraccon.org/userfiles/file/timesasapomibipusuvab.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a26004c11e8---70611037373.pdfIn PDF document text
- http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/4958299735.pdfIn PDF document text
- https://aljazeerahpetroleum.ae/userfiles/files/74513222317.pdfIn PDF document text
- https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/jmvbla6n6a398jnc7ja3njlor5/mivokodizuziwalujotir.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160741b20e1c0b---57848628735.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d05342583d6---xovujujukuxukonurez.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/82ff4a1f493e78bbe0d41016b0dc0cdf/zejomakuvel.pdfIn PDF document text
- http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/62885798782.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f6cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6CB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010ee2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EE2	11004 bytes
SHA-256: `2067d3057a45540571b2b3f005b9e22199a8fafb7a692013ea70928845b4355d`

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