PDF malware analysis — malicious · 70c09e3d19e42dcc

MALICIOUS

PDF

88.0 KB Created: 2021-07-03 07:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 504dbf1ea48fe1fe5db6a3b796ea54c2 SHA-1: 0a57ff8406d4b4af6d80bdc59749307f6e13fb63 SHA-256: 70c09e3d19e42dcc484b0fb31fb5ca9f19ddd604430b8c700b490519d7fa92d1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains a large number of external URIs and links to compromised CMS uploads, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous links point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/a56tr6nlvlkaemk864hpc7v0fr/72093009576.pdf In PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/160171dd1014e849575e363b55069f11/8218545110.pdfIn PDF document text
- https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bce2db7e3da---56539087076.pdfIn PDF document text
- http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c51952481b7---55878282421.pdfIn PDF document text
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d26ea9b92---52356391254.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a306d370a3e---92391587491.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/aa72669a571164e6f45708e3bec24d28/26106695734.pdfIn PDF document text
- http://ouhkpthaa.org/userfiles/zavexugopatamo.pdfIn PDF document text
- http://apartmaji-zunicmile.com/uporabnik/file/8864140805.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2b4d9961a---xumavimojivipop.pdfIn PDF document text
- https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/3986746bb6e5c8720249b6a2e08a6004/96873144406.pdfIn PDF document text
- http://marinapogon.pl/upload/file/7758642463.pdfIn PDF document text
- https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/o87qhnrsikt6i2vejgl6hlnvbt/37124005200.pdfIn PDF document text
- http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1a47ee918---dilagekuxi.pdfIn PDF document text
- https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/d6251fb5f44e441d1e2307c4c3a462db/83814739072.pdfIn PDF document text
- http://kowel.com/ckfinder/userfiles/files/1623390445.pdfIn PDF document text
- https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/sv37i0or5htc9gmbt00c3h9p3a/42172511045.pdfIn PDF document text
- https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/33555272f913b805ac8cab8e0c90df67/lawanosafisaweromop.pdfIn PDF document text
- http://veterina-hrib.cz/user-uploads/files/2018472255.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b301c33efc2---529709013.pdfIn PDF document text
- http://cuatro-pr.org/sites/default/files/file/nomepisolapexumi.pdfIn PDF document text
- https://airbays.com/userfiles/file/fivuxavexufudafenape.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4103ed4bb9c476856b855ffcd679449b/mukuvag.pdfIn PDF document text
- https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/t3r89ef2clv0mbc9m5lekqvbk0/sexazizazilujoziwunen.pdfIn PDF document text
- http://nomaquito-travel.com/editor-images/jujofow.pdfIn PDF document text
- https://allmassage.net/upload/file/20210526160713.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b2cb585c6---17053888751.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a190e55af2c21b8892ef04988da0b3cf/faxepobitimakixinom.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=class+10+maths+chapter+wise+question+bank+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_off0000ee7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE7B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001068d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1068D	19028 bytes
SHA-256: `fb225b2d527b12d2eadfdfbbd31a3d6b7199b8b42abf9d258a768f37d7cdda67`
`font_02_sfnt_off000136cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136CC	11652 bytes
SHA-256: `f53334c7c79bea392c5c98f668c3d7172fe9f2d67e7e4efc8442939f5d2b67b9`

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