PDF malware analysis — malicious · e295f2e6090c3ce3

MALICIOUS

PDF

81.6 KB Created: 2021-09-09 20:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 3e90afb3230199cbb277a610cdf4b3f7 SHA-1: 03b0dff69ed6f89dbbae58f55f4cdfe69b2d264a SHA-256: e295f2e6090c3ce314ece2c274dbe5a3a0ddae71a7ad369d0e8170c9a4c91ed3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a focus on directing users to potentially malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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://drafthe.ru/uplcv?utm_term=installing+system+update+android PDF link annotation
- https://endobible.com/userfiles/file/17119603648.pdfIn PDF document text
- https://ukmalayalamnews.com/userfiles/file/49991506472.pdfIn PDF document text
- http://k2plusinterior.com/userfiles/tilad.pdfIn PDF document text
- http://namngonviet.com/user-/files/vijotopuvawak.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135abd2a5b79---finogitezozafagogow.pdfIn PDF document text
- https://sfeerweter.nl/userfiles/files/sebonidusidi.pdfIn PDF document text
- http://www.oteliapelsin.ru/ckfinder/userfiles/files/19414897853.pdfIn PDF document text
- http://mtegl.wsystem.sk/userfiles/files/revaveboxozalopogadubo.pdfIn PDF document text
- http://coeb.eu/userfiles/files/9588541426.pdfIn PDF document text
- http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/bisigupesuvalebefamidi.pdfIn PDF document text
- https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/5mvkct8ujkamftivfar2aqhqjc/vixomivabaruxor.pdfIn PDF document text
- https://thinkglobalcompliance.com/ckfinder/userfiles/files/3311150154.pdfIn PDF document text
- http://hart-metale.pl/gimnazjum/userfiles/file/fokijejupigoromejurive.pdfIn PDF document text
- http://osstemcardiotec.com/files/fckeditor/file/131715193861340b6d0e1ff.pdfIn PDF document text
- https://nomortiga.com/contents/files/83058628640.pdfIn PDF document text
- http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613544579c05c---beripurumi.pdfIn PDF document text
- http://sieuthimaynhapkhau.com/upload/files/4969023798.pdfIn PDF document text
- https://morganmethod.tuesdaytrader.com/ci/userfiles/files/4214044419.pdfIn PDF document text
- http://kimhoatra.com/upload/fckimagesfile/46387219395.pdfIn PDF document text
- https://ceccarmehedinti.ro/userfiles/file/50149568658.pdfIn PDF document text
- http://tnshoppingbag.com/upfiles/file/31808588577.pdfIn PDF document text
- http://3qbuy.com/CKEdit/upload/files/wupalejurivajonu.pdfIn PDF document text
- http://beerskiboot.de/img/upload/file/57543634551.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130b04879102---36266144434.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_off0000d6a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6A7	18980 bytes
SHA-256: `0ba1b2669193b4050f8a1109c7d713739329bf6a1af50f83177f9e611b17b4d8`
`font_01_sfnt_off000107eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107EB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012002.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12002	10900 bytes
SHA-256: `d3d0c31c5344bca42c93e61453d875d872b25c72d69427e4ca7a0115a87cfec7`

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