PDF malware analysis — malicious · 1401d9420f386b5f

MALICIOUS

PDF

71.8 KB Created: 2021-10-19 19:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: cbfdc97e231e3b87914920295bc6ff55 SHA-1: 290597159fe2797ac3465d2ee25352575460ffff SHA-256: 1401d9420f386b5f694365614bab7551375ba86db1de5c9803d6d7298e3a8e1b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many of which point to disposable domains and appear to form a link farm, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://sweatrinserepeat.com/ckfinder/userfiles/files/21964872021.pdf In PDF document text
- http://reelproductionshd.com/userfiles/file/fojoxijunigiwexege.pdfIn PDF document text
- http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/91848946888.pdfIn PDF document text
- http://jadeite.ru/images/file/70795839951.pdfIn PDF document text
- http://capitolmetrophysicaltherapy.com/files/files/68269106867.pdfIn PDF document text
- https://bevillelecomte.com/ckfinder/userfiles/files/97510966838.pdfIn PDF document text
- http://dentalcenterstudio.it/userfiles/files/73534501326.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16161498d627b8---rurexiwagujewozez.pdfIn PDF document text
- http://ocvitlucky.com/vietkiendo/upload/file/muwesomogiribazuwedexuj.pdfIn PDF document text
- http://saipanbooking.com/FileData/ckfinder/files/20211015_1383BFBEBDBBA3D5.pdfIn PDF document text
- https://mahanakhon.pacedev.com/ckupload/files/6888465956.pdfIn PDF document text
- https://dewalt-naradi.cz/media/upload/editor/file/lenedijidoxapune.pdfIn PDF document text
- https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/33423793260.pdfIn PDF document text
- http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bovad.pdfIn PDF document text
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16162712841474---1485682497.pdfIn PDF document text
- http://cancunday.com/travela/img/files/62554396721.pdfIn PDF document text
- https://used-machinetools.ro/app/webroot/files/userfiles/files/neluwuz.pdfIn PDF document text
- https://cmflower-kkc.com/ckfinder/userfiles/files/15347866463.pdfIn PDF document text
- http://prabashproperties.com/ckfinder/userfiles/files/13442457314.pdfIn PDF document text
- https://ichibaninfotech.com/ckfinder/userfiles/files/guzaradijujisonilipuvado.pdfIn PDF document text
- http://feedproxy.google.com/~r/MbOu/~3/6Zflnl449io/uplcv?utm_term=que+es+el+referente+en+los+elementos+de+la+comunicacion+ejemplosPDF 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_off0000b2dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB2DD	16964 bytes
SHA-256: `df2de3aa20e85edec394599dba23cf2b803c3ba075f535add0d7523fbb6bec04`
`font_01_sfnt_off0000dd82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD82	11068 bytes
SHA-256: `903fd2ab74e52bffe6915e222e0da46702f5d497a1b27c723fe5a11c0c84067e`
`font_02_sfnt_off0000f75a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF75A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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