PDF malware analysis — malicious · de3ed28d594a069a

MALICIOUS

PDF

87.4 KB Created: 2021-06-27 06:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: af4ccc9b5333ff178dc96c8fe4b56335 SHA-1: c41f711f25e4071e38fd3dd19e2f92b7bd2a7130 SHA-256: de3ed28d594a069aa0685483db8567d32f155a877b190c592f8a8c365775bfc6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely intended to host malicious content or phish users. The document body is heavily obfuscated and contains no readable text, suggesting its primary purpose is to house these malicious links.

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 http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f60267683---bikozusomutigabaf.pdf In PDF document text
- http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be2422aae8f---kewilof.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64fdd49369---98346527452.pdfIn PDF document text
- https://hotel-la-licorne.fr/userfiles/file/pewodetadun.pdfIn PDF document text
- https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160701829ee686---fewetifepipun.pdfIn PDF document text
- https://atamergranit.com/userfiles/file/21643871876.pdfIn PDF document text
- https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/09a9ede5463ac9ec7267936990d7cc25/gozak.pdfIn PDF document text
- http://ajtoablakcentrum.com/_user/file/wivedule.pdfIn PDF document text
- https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/36f4286ee384c2f36a593106c81dada8/6419674854.pdfIn PDF document text
- https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4207c88d0---dodatok.pdfIn PDF document text
- https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609427fb7ce86---39788435370.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3baddae4c---1465570513.pdfIn PDF document text
- https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2413d5353---65231529076.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094276a4f489---kofesumiwifewilewaloluni.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/a7ef060a74cddf52edaa1ebf3db6f650/fikudoregenorixebadosa.pdfIn PDF document text
- http://re-view.online/fckFiles/file/72757598834.pdfIn PDF document text
- http://wijnhuis-vaessen.nl/site/data/ws/files/rujudasexiwameviwibo.pdfIn PDF document text
- https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//fololesukisofadab.pdfIn PDF document text
- https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/01d6f7166f1656d5ef402e0725495cf6/56949188655.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qbnp1j282p38m4ts73bubdrmn4/28818801310.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/mfmtpk17har9qikf5nf7um7r22/33458080738.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7b7dd6393---59107416184.pdfIn PDF document text
- http://zonweringbelgie.be/ckfinder/userfiles/files/73469048864.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca10264e8c---bovuwudovukopibifoga.pdfIn PDF document text
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608adc0cd9af2---xawid.pdfIn PDF document text
- https://securityguardsupply.org/php/uploads/file/rimoxasub.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=time+of+revolution+of+earthPDF 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_off0000f255.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF255	17560 bytes
SHA-256: `648f75957edfd0bc4903e6b21c9327ad46eaca077814c665d375b17e522794d7`
`font_01_sfnt_off000120a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120A9	10440 bytes
SHA-256: `ba1bc7c183ee304a390a176c296763b36e09f5cd8065ac601b40358311031f4e`
`font_02_sfnt_off00013822.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13822	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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