PDF malware analysis — malicious · 58a3182e72faa80e

MALICIOUS

PDF

81.4 KB Created: 2021-09-17 10:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 24c701c9829ac86d372ba672669263bf SHA-1: 3e9bf384c4ee3b5f78b3b5d0a8907b413ecfcee7 SHA-256: 58a3182e72faa80e6a57d49cbb3676cc702a35c834e70134814446b280105ce8

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to T1059.007, and the nature of the file as a potential attachment suggests T1566.001.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://tractorpulling-emmeloord.nl/upload/file/vorux.pdf In PDF document text
- https://dongcohonda.com/userfiles/file/18481264439.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1614017ef5e542---mirejugadakanim.pdfIn PDF document text
- http://allgeology.ru/ckfinder/userfiles/files/27905711202.pdfIn PDF document text
- http://ciaomamma.hu/editor_up/xininagizitekak.pdfIn PDF document text
- http://martom24.pl/martom/userfiles/file/reduwodalusisudug.pdfIn PDF document text
- https://khyatiinfotech.biz/ckfinder/userfiles/files/7950383086.pdfIn PDF document text
- http://thienminhgroup.com/uploads/userfiles/file/liwogovuritaka.pdfIn PDF document text
- http://richmediahouse.com/admin/uploads/file/76494845712.pdfIn PDF document text
- http://gandolfiarchitetti.com/userfiles/files/67558197933.pdfIn PDF document text
- https://all-stage-meditation.tw/uploads/files/61424fdbaee6a.pdfIn PDF document text
- http://law885995.com/upload/fckimages/file/91121692579.pdfIn PDF document text
- http://bjsixiang.com/jingkelun/userfiles/files/20210908141008.pdfIn PDF document text
- http://acril.ru/ufiles/files/8213196857.pdfIn PDF document text
- https://profitaler.com/UserFiles/file/37455782831.pdfIn PDF document text
- https://ozmutludokum.com/userfiles/file/nomikepizedolovexebarir.pdfIn PDF document text
- http://brmhn.com/userfiles/file/20210913111526_5wbmgr.pdfIn PDF document text
- http://pilot-market.ru/new/files/file/jupag.pdfIn PDF document text
- http://slovbau.sk/test/userfiles/file/zuwexujudid.pdfIn PDF document text
- http://100gastro.cz/soubory/files/bugiwevew.pdfIn PDF document text
- http://studiomalpocher.it/userfiles/files/67809125038.pdfIn PDF document text
- http://laulumaja.fi/ckfinder/userfiles/files/15485786577.pdfIn PDF document text
- http://artattack-concerts.de/files/file/lerisakutisibak.pdfIn PDF document text
- http://daieimotors.com/js/upload/files/55551039539.pdfIn PDF document text
- http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4fb24a68b---nuvurot.pdfIn PDF document text
- http://sarigol.kr/userData/ebizro_board/file/pinexunokiwaviwawizaveke.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=outlook+shared+calendar+not+updatingPDF 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_off0000d7b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7B8	17812 bytes
SHA-256: `c0eecef2c7e773bb6aeaf5b9d09c974d15fbf32b9e6b9b8835da0ceab3718c98`
`font_01_sfnt_off000105ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105EE	11008 bytes
SHA-256: `24dc3013f481576a018755415c9158c875ca65c588084bf7091b9257791852fa`
`font_02_sfnt_off00011f51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F51	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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