PDF malware analysis — malicious · 2d9d20c7fca94209

MALICIOUS

PDF

80.7 KB Created: 2021-09-10 22:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: bf4d8c95a666502a75cee717d0dec275 SHA-1: 36c85f145910b393096dec88d4213b3bd92ae876 SHA-256: 2d9d20c7fca94209ef6af2c988dd99c1da9537a51afe4f1589bed95f7c27ef60

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier. A critical heuristic indicates a clipboard command execution lure, instructing the user to copy and paste content into a shell, which is a common technique for executing downloaded payloads. The PDF also contains numerous embedded URLs, many of which are unknown and could serve as download sources for further stages.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b64ec3c9eb---19386208170.pdf In PDF document text
- http://elesi.eu/fichiers/files/66841586630.pdfIn PDF document text
- http://ubest.ru/images/file/18867387634.pdfIn PDF document text
- https://confetti-seasons.ru/upload/files/38241263077.pdfIn PDF document text
- https://businesslife.com/content/files/liwadif.pdfIn PDF document text
- http://am-assets.com/aom/magnolia/userfiles/file/repukozinuk.pdfIn PDF document text
- http://dalnoboy.org/data/filestorage/upload/files/3620346214.pdfIn PDF document text
- http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/wuvanudolinatuvejaku.pdfIn PDF document text
- https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/nujfie29lh3od9gbe9kb59rfaj/nosebuxewomi.pdfIn PDF document text
- http://sinosteelcode.com/filespath/files/20210905220224.pdfIn PDF document text
- https://eslms.com/userfiles/file/36135236870.pdfIn PDF document text
- http://satcomlink.com/userData/board/file/zitedawebafunagumalagabi.pdfIn PDF document text
- https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/ribonusegeme.pdfIn PDF document text
- https://cam-ceeds.org/ckfinder/userfiles/files/48719886220.pdfIn PDF document text
- http://www.evisiontiendaonline.com/ckfinder/userfiles/files/64743309254.pdfIn PDF document text
- http://martonaroniskola.net/userfiles/file/24806022922.pdfIn PDF document text
- http://pilot-market.ru/new/files/file/54502876025.pdfIn PDF document text
- https://svltv.in/userfiles/files/gokijimemi.pdfIn PDF document text
- https://nexapos.com/upload/files/sivelixabajon.pdfIn PDF document text
- https://eltechma.com/zdjecia/fck/file/sepatupefazafef.pdfIn PDF document text
- https://kozmetikadunakeszi.hu/userfiles/file/pubotowilapafowuvodape.pdfIn PDF document text
- http://www.examnotice.in/uploads/files/wegukakazitupujifumi.pdfIn PDF document text
- http://jlicentral.com/images/authors/file/xumudezuwoxejulu.pdfIn PDF document text
- http://mrybalko.ru/files/xamalo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=airdroid+pc+windows+10PDF 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_off0000d79e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD79E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000efb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB0	17880 bytes
SHA-256: `1e186ab6e9313f3cf1f2a9de24b8cb24287134af4fd8e592b35618f1749c8893`
`font_02_sfnt_off00011e06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E06	10312 bytes
SHA-256: `d04df5a96fc5d8f13de97ec9d7070cae4230e45b14cc6769d07b4ab560d83a4e`

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