PDF malware analysis — malicious · e77b1fa12eb9c988

MALICIOUS

PDF

90.8 KB Created: 2021-09-08 21:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 64ea9f0e63800cc98106b7a9f79f1b8a SHA-1: 3cc3ffc82bd8c6fe19e170f0967ef3d79a86b989 SHA-256: e77b1fa12eb9c988c07c91c6bebf7f3091a4dd8287fdba74a601d22b96860174

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9937

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://pepinieres-soupe.com/userfiles/file/nuxadedubafa.pdf In PDF document text
- http://studiocariola.com/userfiles/files/jupavugogu.pdfIn PDF document text
- https://itandem.net/ckfinder/userfiles/files/fuzepijevotevuvex.pdfIn PDF document text
- https://hurghadalife.net/userfiles/files/37650743015.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16138b48380dbc---87149826606.pdfIn PDF document text
- http://jevades.com/aircraft/fckimages/file/18484601741.pdfIn PDF document text
- http://aajude.pt/backoffice/ckfinder/userfiles/files/ronusomuzefikefidixiw.pdfIn PDF document text
- https://a-guskov.ru/uploads/files/lonepazuterataja.pdfIn PDF document text
- https://jbdclothiers.net/emailer/userfiles/file/wakofagat.pdfIn PDF document text
- https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/famebitavapukokewo.pdfIn PDF document text
- http://kechengchem.com/upload/files/pagubolesatotutideme.pdfIn PDF document text
- http://phulieumaymacbaoco.com/hinhanh_fckeditor/file/xesomab.pdfIn PDF document text
- https://edu-mate.kr/_UploadFile/Images/file/lezusimeba.pdfIn PDF document text
- https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a1353b04c---59966634913.pdfIn PDF document text
- http://hanasushi6.com/uploads/files/notiwapebuvoxo.pdfIn PDF document text
- http://sarljarry.fr/userfiles/file/84645317993.pdfIn PDF document text
- http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/relesomojadamo.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613670f75c9a2---zogoginone.pdfIn PDF document text
- http://npk-bypassdrr2.com/file_media/file_image/file/wetifarivetumejij.pdfIn PDF document text
- http://e-restauracion.com/app/webroot/files/uploads/files/36569765038.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613256ff088f4---92978130343.pdfIn PDF document text
- http://photonart.nl/phpcmsys/file/5850380676.pdfIn PDF document text
- http://triatlonbizuterie.cz/sites/default/files/file/8261101713.pdfIn PDF document text
- http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/sapasetiju.pdfIn PDF document text
- http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161339722742c3---67529754113.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=kumpulan+jurnal+linguistik+umum+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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fa8e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA8E	10904 bytes
SHA-256: `207397454bb45c8de959324376ec2cf0b0bb1e79d9da3d6e89dc298eb4f50316`
`font_01_sfnt_off00011376.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11376	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012b88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B88	19304 bytes
SHA-256: `d1087880140c6d43c524cbe8429e9166aa47bcc9b35a5036ee6d574b0872107f`

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