PDF malware analysis — malicious · 9cc24ac1a06d61e8

MALICIOUS

PDF

86.5 KB Created: 2021-09-04 13:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: e36bfd80cc60bd7f120967d8b000dcbc SHA-1: 6f8fc867ffa62ec21a38c79bf1710f34d52286b0 SHA-256: 9cc24ac1a06d61e8ce641f0a415a0e2121e4229b7b28bea4772e75e2c6601582

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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://smidgel.ru/uplcv?utm_term=looters+and+grabbers+by+joe+khamisi+pdf PDF link annotation
- https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e1740d2d5---7281824795.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b6e3f80636ff77c0a566424590138e32/woredopujikatusekifepuvum.pdfIn PDF document text
- http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/27296834210.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/jevuzosipobiwukuses.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b45e72f036---84869334388.pdfIn PDF document text
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1612de78a7d039---bazapijusuzuwek.pdfIn PDF document text
- https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/5o9aep85uej8papv48nl95ne5p/jixonegexovokemudu.pdfIn PDF document text
- https://djennebeads.com/nbloom/fckuploads/file/vafogasudusisas.pdfIn PDF document text
- http://werkkledingverkoop.nl/images/docman/files/sedosaforu.pdfIn PDF document text
- http://wadirumshootingstars.com/userfiles/file///ruperagebafotorugonebofuf.pdfIn PDF document text
- https://grandhotelushba.com/userfiles/file/nimazonobubaluk.pdfIn PDF document text
- https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/f3df8eeaa8ab613909cbb9de8f48fef8/91511647052.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608989b3ce79e---jozurawoxumanabevomabu.pdfIn PDF document text
- http://agriturismofattorialucciano.it/ckfinder/userfiles/files/texigenug.pdfIn PDF document text
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c710c0f2845---feluxewol.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/58371ho24a8aqa9odj7kpgcigu/62714109062.pdfIn PDF document text
- http://faradtvandor.hu/picture/userfiles/file/ranoxijol.pdfIn PDF document text
- http://mientaytourist.com/uploads/files/68582226310.pdfIn PDF document text
- http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/rimubotukise.pdfIn PDF document text
- https://zoldlepes.hu/userfiles/file/95863794912.pdfIn PDF document text
- http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/jjqtotok0knfdaor03i1sphtb0/gurisusekupuwokofuvupowep.pdfIn PDF document text
- http://paulsaperstein.com/userfiles/files/defupuganuboji.pdfIn PDF document text
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b6b5f7b50b---kuretodarekabemalegu.pdfIn PDF document text
- http://writtenmail.com/upload_images/file/32888318736.pdfIn PDF document text
- https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/b85f70bc533c5f6a2d9c36a7c0ed8a85/wedinigotanevikufazilurip.pdfIn PDF document text
- https://tarzminder.com/resimler/files/2569263340.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_off0000e93d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE93D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010154.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10154	11332 bytes
SHA-256: `496c96a197448a83c11a6568a185cfbe61c329fa88342a4e031f6c093373a577`
`font_02_sfnt_off00011b5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B5B	18936 bytes
SHA-256: `f0cf69537f74d2862d414bf74501da27a4d5339e4b312797660cb8a004ab4025`

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