PDF malware analysis — malicious · 8aeba06c2fcf2f62

MALICIOUS

PDF

76.3 KB Created: 2021-09-26 21:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 16f868c54e529336924a6a29ea104867 SHA-1: be5175aa25bf6a012be9eb23bdd6bfa5279057bc SHA-256: 8aeba06c2fcf2f62dae3ad77bb523a68ceb25d03f18e9ef74e9e7ef97c427bce

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of external URIs and the nature of the link farm heuristics indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

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=apk+obb+games+offline PDF link annotation
- https://www.comperat-89.fr/ckfinder/userfiles/files/napazosu.pdfIn PDF document text
- http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613416589c19d---66343047640.pdfIn PDF document text
- http://ahrestygz.com/userfiles/files/20210926_150340.pdfIn PDF document text
- https://riwg.in/userfiles/file/linuxaroposetuvet.pdfIn PDF document text
- http://hfnhsw.com/upload/files/87146775896.pdfIn PDF document text
- http://superbarter.sk/media/file/69014266093.pdfIn PDF document text
- https://rpdev.org/ckfinder/userfiles/files/31318487945.pdfIn PDF document text
- http://eis-pieschel.de/UserFiles/File/95782931037.pdfIn PDF document text
- http://mfahk.com/upload/files/56471276964.pdfIn PDF document text
- http://joesservicecenternj.com/userfiles/files/65371547644.pdfIn PDF document text
- http://elitacasa.it/images/file/tepafixuvu.pdfIn PDF document text
- https://calson.garment-pro.com/ckfinder/userfiles/files/21189743387.pdfIn PDF document text
- https://textmakareknutsson.se/upload/image/lobukivalozaro.pdfIn PDF document text
- https://media-get.com/userfiles/files/nofiganu.pdfIn PDF document text
- http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f65893e2d4---nijovupaxelokefirenuruj.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161411094e3616---14004659444.pdfIn PDF document text
- http://na-bytecek.cz/UserFiles/File/pezabawofedifipedikimibe.pdfIn PDF document text
- http://vecsecity.info/editor_up/35729334617.pdfIn PDF document text
- http://vdavloeren.be/userfiles/files/gusidu.pdfIn PDF document text
- https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/161413a0203d6b---72142517905.pdfIn PDF document text
- http://tortsurprise.ru/upload/redactor/files/75843537843.pdfIn PDF document text
- https://cheeselicious.net/UserFiles/file/3708434149.pdfIn PDF document text
- https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16150794bebc96---10557372441.pdfIn PDF document text
- https://alwillislifecenter.org/ckfinder/userfiles/files/46872895132.pdfIn PDF document text
- http://agriturismoilnoceto.com/userfiles/files/15176383984.pdfIn PDF document text
- https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/2555c8864040ac75d86a0dc615e33d28/37071380545.pdfIn PDF document text
- http://mstreatmentadvances.com/userfiles/files/vujatebakijoduvo.pdfIn PDF document text
- https://www.channeloflove.com/ckfinder/userfiles/files/dinokebixekosuzujemowodeb.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_off0000bfb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBFB2	10716 bytes
SHA-256: `b353f9a47c4362c51d58177f8a18ff8cd5116c37329358a7ee1e6d479c05c419`
`font_01_sfnt_off0000d81b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD81B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f02d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF02D	19476 bytes
SHA-256: `ddf1af612991150dd27c7021015b19d5e0c618c9bcb592cf170c38773dd64c3d`

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