PDF malware analysis — malicious · d286d3644e1b0af0

MALICIOUS

PDF

85.7 KB Created: 2021-07-01 17:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: f70a2a77b7cea3797f6ff2996d54e233 SHA-1: 12b72c8178cc7f65e52e8ae1e3a45c161fe473ab SHA-256: d286d3644e1b0af0f330b53825ce3bc67cb59c3b312de595de5d8397fa3e1555

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to potentially compromised CMS upload directories or disposable hosting, suggesting a link farm or phishing lure. The presence of external URI heuristics and the ML classification strongly indicate a malicious intent, likely related to phishing or directing users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/sewowose.pdf In PDF document text
- http://modero.vn/upload/files/dekoloremawel.pdfIn PDF document text
- http://kochamsushi.pl/UserFiles/file/28963812460.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/47eb5f660061e9fefc980fe18fb260a8/jukuninaluzidarubuxe.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4614ade4a0---xetalimagewapuxozadewa.pdfIn PDF document text
- https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/nrpnspkg6r08be76f2mkkdl4mv/93955379300.pdfIn PDF document text
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/2342bac9e898396618241bc53f882158/gijabumazidoju.pdfIn PDF document text
- http://ytovietnam.net/ckfinder/userfiles/files/70825583721.pdfIn PDF document text
- http://brandnewgoods.net/userfiles/file/paxorolazetepilolawomu.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f4cb1c606---23729730273.pdfIn PDF document text
- http://trendstyleimage.com/uploads/ckfinder/userfiles/files/21974205777.pdfIn PDF document text
- http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0e303a5bc---gogufozadugaxi.pdfIn PDF document text
- https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2d8c8c57b---56597001726.pdfIn PDF document text
- https://bevelec.com/bevelec/dossierMois/file/gelakunareredi.pdfIn PDF document text
- http://jakpaisanestate.com/images/upload/files/53143153492.pdfIn PDF document text
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/2b770a1eb55d78d4e67f708bec17702b/56131352876.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f83a27528---kenobimitiwubud.pdfIn PDF document text
- https://arredamentigiacobbe.it/file/18078926663.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5fe6383ea---4887782672.pdfIn PDF document text
- https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/e12996999564a53aa85f02c22523a21a/69945704663.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/205b6ef2b111ba82a4c1bd9a59273cfb/pufamugeturiwonex.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/87c23901f5e8570a18db43f8c8d8abbb/fupiwikatugotujevez.pdfIn PDF document text
- http://tunglamgarden.com/images/fck/file/31725180588.pdfIn PDF document text
- http://mosvag.ru/img/lib/file/77735361870.pdfIn PDF document text
- http://accessibilite-salle-eau.com/ckfinder/userfiles/files/niwivuwikalozosigiturir.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=apa+title+page+running+headPDF 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_off0000ed55.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED55	10464 bytes
SHA-256: `f7a59fa4888b6d796cb4f47503d2b902ab71704709e0defd626dcae7c6676b49`
`font_01_sfnt_off000104c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104C5	16688 bytes
SHA-256: `616a6fa0cc4df0beed6babd00c2e62132d19629512bb40add9191828f6143e1b`
`font_02_sfnt_off00012fc1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12FC1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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