PDF malware analysis — malicious · d13d3bc1ae94b5f3

MALICIOUS

PDF

85.3 KB Created: 2021-09-07 13:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 4d97d8571a3b7a7b678138f41d3b5624 SHA-1: b7a91e8051ea34c934068f193a5acfdc0ac34324 SHA-256: d13d3bc1ae94b5f334d7ef4f2d78cc366d1066df1ded1661e2563e2eb5626921

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to lure users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://inwebjor.ru/uplcv?utm_term=original+kettle+premium+charcoal+grill+22+manual PDF link annotation
- http://gustosandvic.com/ckfinder/userfiles/files/97808401092.pdfIn PDF document text
- https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/1g88aauopbndkjc8bjhr6l1cd6/gotowepekegukapabemuje.pdfIn PDF document text
- http://scales-center.com/shop/fck_file/file/lekobaginadaputemegosasu.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085670125898---20944245569.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad55db9e488---lazuxebinejopokerujajegar.pdfIn PDF document text
- https://sarna-zapiekanki.pl/ckfinder/userfiles/files/13338071370.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ca6ec15379---42585495007.pdfIn PDF document text
- http://www.colormotion.cz/UserFiles/file/felofugutuxebelagag.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/970b2a54dfa7c405c055502ee6090d7e/34619202992.pdfIn PDF document text
- http://rw-hse-businessconsulting.de/userfiles/file/6214814768.pdfIn PDF document text
- https://powermailer.in/userfiles/file/vutip.pdfIn PDF document text
- http://nppmaudaha.in/ckfinder/userfiles/files/zusuburanenesoluvuzag.pdfIn PDF document text
- http://pechati-piter.ru/userfiles/file/sulukosubasaza.pdfIn PDF document text
- http://lamekatus.com/uploads/ckeditor/files/6330193223.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/kanonojixo.pdfIn PDF document text
- https://rubin2000-distribuitorshop.ro/userfiles/file/89933853226.pdfIn PDF document text
- http://coreaad.com/DreamDataUpload/file/joxavedabudolukofoze.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/ce1c9a9be62927aa9a9ad6ec0968f1a3/lapales.pdfIn PDF document text
- http://centralgiving.com/media/userfiles/file/norosoguvipi.pdfIn PDF document text
- http://www.cda.org.hk/ckfinder/userfiles/files/44314642960.pdfIn PDF document text
- https://stopserv.ru/files/file/xolebejogubematokom.pdfIn PDF document text
- http://bajkolandia-leszno.pl/userfiles/file/pujujurasimutititotugidom.pdfIn PDF document text
- https://graveyards-fuj.ae/userfiles/files/80261973143.pdfIn PDF document text
- https://eravukappalpalli.com/userfiles/file/tizobasuxewiponufapibud.pdfIn PDF document text
- http://thetestmag.com/userfiles/files/xamulubo.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_off0000df73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF73	20988 bytes
SHA-256: `f3e145b17b9aaff5ca005babdd78348655b6c2c8d3907402ce3427419216e422`
`font_01_sfnt_off000115f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115F6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012e0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E0D	10988 bytes
SHA-256: `07805e73aa93c9b0dc189f4c58d753310c3cd554a94f71b3e318294f0469b649`

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