PDF malware analysis — malicious · ec09854e6b4cf732

MALICIOUS

PDF

86.9 KB Created: 2021-06-30 22:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: b6c7eb03d34bf03a887a82ae02215692 SHA-1: f4d839f47cfa721c78ad392d8cf84b2d664b44a3 SHA-256: ec09854e6b4cf73205920feacee1a99b52b193b4178566da28fe0b59e6aea331

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and embedded links indicate it is designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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://wastran.ru/uplcv?utm_term=how+many+bottles+of+wine+in+a+3+litre+box PDF link annotation
- https://cottonweb.net/userfiles/file/peretuzokekafotutikafuram.pdfIn PDF document text
- https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/17cf12ca1bb424a46a3e0853f1ba731b/26883807543.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-4-30/20210430171534303719.pdfIn PDF document text
- http://ciarajewellery.com/editor_upload/file/57961549911.pdfIn PDF document text
- https://area34.info/wp-content/plugins/super-forms/uploads/php/files/lisj602cna556benr0pvlb7r17/vefivajanikudosidogik.pdfIn PDF document text
- https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16098cc1e5fc7d---92766345450.pdfIn PDF document text
- http://archerelectricsupply.com/userfiles/file/fiwik.pdfIn PDF document text
- http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/rexerevijisogixi.pdfIn PDF document text
- https://tusenfotingen.nu/anvandarbilder/108/files/3073780170.pdfIn PDF document text
- https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9c5d2f7b6---suxorapudidolebat.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826d8532dd8---64767719477.pdfIn PDF document text
- http://esipro.fr/userfiles/file/getozazajepoxazebimini.pdfIn PDF document text
- http://aaaexpressheating.com/userfiles/file/10226120488.pdfIn PDF document text
- http://teplospectr.ru/images/files/25422441221.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082481144444---59000310871.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f7ffbe413---94674136036.pdfIn PDF document text
- http://lpkgoodframeupvc.com/userfiles/files/jezabawofuvatinedutemuzal.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967a66a293d---lebonimarote.pdfIn PDF document text
- https://aprilboya.com/userfiles/file/15820605920.pdfIn PDF document text
- http://alexlunacoach.com/img/editor/file/zaxanuxogozadafodobi.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/fb3effb3cc241187b2e0bee035eb06d8/10189056017.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/s38fnnb7h7la522maqndp183pt/saxagupuw.pdfIn PDF document text
- https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73ad982919---nawesobet.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921c7f43d32---52570078279.pdfIn PDF document text
- https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/c3e11949a15c0915db5ac048fa6a8398/dakilaluganuxugikukitexe.pdfIn PDF document text
- https://communeouchamps.fr/userfiles/file/1868047296.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_off0000eecb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEECB	17648 bytes
SHA-256: `151a59ed30e1cd41891ea285193f9bfd14b342edb623fc171203b31292944c49`
`font_01_sfnt_off00011c4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C4D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013464.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13464	10980 bytes
SHA-256: `aefc1320af2f5704097eb84514a1c6c3a4af739ec0442708283987af867f8539`

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