PDF malware analysis — malicious · 1494b345293ebc67

MALICIOUS

PDF

78.5 KB Created: 2021-09-20 14:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: ce9d4119c2b76f0b18396c7a5cdde9b7 SHA-1: 81f13914906ab8a60f5dd8457ce6580160f97fe0 SHA-256: 1494b345293ebc67384ef6cbfcacabc6b559c006f8c86a12d77bea9e7ecb1c4f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which appear to be disposable or compromised, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://tubietelbar.hu/uploadfile/rurimiwafisepebalemuw.pdf In PDF document text
- http://tatagz.com/uploadfile/files/wimibomadugixodud.pdfIn PDF document text
- https://onecre.com/images/content/files/3248751879.pdfIn PDF document text
- https://webmenuplus.com/images/file/97000513075.pdfIn PDF document text
- https://aradovan.com/userfiles/file/22316098793.pdfIn PDF document text
- http://www.deep2001.com/images/library/File/3279317726.pdfIn PDF document text
- http://veewood.com/file_media/file_image/file/jobezale.pdfIn PDF document text
- http://jinruily.com/UploadFile/file/20210905042722922.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161356cdbc700d---jelefanala.pdfIn PDF document text
- http://www.saletime.gr/admin/fckfiles/file/9778770538.pdfIn PDF document text
- http://fullcolorspandoeken.nl/userfiles/file/65799424330.pdfIn PDF document text
- https://cr2tek.com/userfiles/Proj_Name/files/jibujimegabevima.pdfIn PDF document text
- https://inprovitmexico.com/ckfinder/userfiles/files/numige.pdfIn PDF document text
- https://global-product.org/CKEdit/upload/files/86413206603.pdfIn PDF document text
- http://bilateralmatters.org/userfiles/file/gonud.pdfIn PDF document text
- http://issaproject.com/app/views/panel/ckfinder/userfiles/files/lawipubuxawajegu.pdfIn PDF document text
- http://arc-en-cielproduce.com/ckfinder/userfiles/files/luwedoronosirida.pdfIn PDF document text
- https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613443bc48d82---bubanenodexabevo.pdfIn PDF document text
- http://bijverhoeven.nl/uploads/files/kepubexuxojafobewuxogika.pdfIn PDF document text
- http://wrtour.com/FileData/ckfinder/files/20210901_01C6AF28E60EFBB1.pdfIn PDF document text
- http://edilgroupdigiovanni.it/userfiles/files/teviw.pdfIn PDF document text
- http://sumbulefendiegitimvakfi.com/resimler/files/mozeju.pdfIn PDF document text
- https://plantbiochem.com/ckfinder/userfiles/files/dunigufepev.pdfIn PDF document text
- http://1-champagne.com/blog_images/blog_/file/jaxodoridejafivuradizutes.pdfIn PDF document text
- https://mlmrockstars.com/ckfinder/userfiles/files/kinetora.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cab7bba665---givawotexizofiwevi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+apk+astro+file+managerPDF 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_off0000cc5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC5F	11020 bytes
SHA-256: `0b6428f7e24a5b2909d282ee0593abf15b1c5ceeaab2c09e9aeac6c0b452cd29`
`font_01_sfnt_off0000e5dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5DC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fdee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDEE	18008 bytes
SHA-256: `33a5acb25525a83b10b7c4d2de960cb9cae16df2addd7eccca9a873ed53e57fb`

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