PDF malware analysis — malicious · 297e1d6967cedc43

MALICIOUS

PDF

83.2 KB Created: 2021-09-18 23:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 13c1cf63173901bdfbb304f7ff64220a SHA-1: 4f16994bee4a1d31eca73f42ee6e29cc2486c9ed SHA-256: 297e1d6967cedc43ba71af5b26f0f2809fe29826ac47b767e6b71e78678724fe

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains malicious content. The heuristics indicate the PDF acts as a link farm, directing users to multiple compromised WordPress sites and other disposable hosting domains. These links likely serve as a lure for phishing or to download further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/161427b8b59c2d---pezunevatenajawi.pdf In PDF document text
- http://murasakijr.com/uploads/files/5167479049.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/4d7bec68d353e5b65a34d351662c2034/jegubuvelumo.pdfIn PDF document text
- http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/5q2bqdt2o4qjaqkp5qkmo2a7n9/33555299262.pdfIn PDF document text
- http://jump360.co/upload/files/20210916233634.pdfIn PDF document text
- https://lawweb.info/mycms/admin/userfiles/file/36939997228.pdfIn PDF document text
- http://istihdamhaberleri.com/upload/ckfinder/files/12399479671.pdfIn PDF document text
- http://imoroz.by/upload/file/kitozogapuvoleju.pdfIn PDF document text
- https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/2201c2037cfad39810d0432bc2222cc6/64219589026.pdfIn PDF document text
- http://andrelandberg.com/userfiles/file/67302235314.pdfIn PDF document text
- http://olymp-kiev.com/temp/fckeditor/file/fivotofiwulesowadibomu.pdfIn PDF document text
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133f47a2f8c1---tamopimifelodabivepa.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b122f73cce---morovedesemu.pdfIn PDF document text
- http://faw-asia.com/image/upload/files/32861295384.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d48a704b0---gumut.pdfIn PDF document text
- http://lsphc.com/userfiles/file///mafopejedibizemagekob.pdfIn PDF document text
- http://rajhansnursery.com/userfiles/file/1828191227.pdfIn PDF document text
- https://padservhosting.com/userfiles/file/54933265974.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ab5a52045fe3f428e5f02aaed0c4e62a/zibipo.pdfIn PDF document text
- https://gbp.dropship-online.com/userfiles/files/51616921954.pdfIn PDF document text
- https://activsport.ro/userfiles/file/fewepogupasivizopojawa.pdfIn PDF document text
- http://soft-pro.hr/upload/datoteke/xerikolidabez.pdfIn PDF document text
- http://interface-referencement.com/userfiles/file/5327855113.pdfIn PDF document text
- https://dwitunggaljaya.com/sitefiles/file/45139403737.pdfIn PDF document text
- http://dywin.com/uploadfile/files/kifefew.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=zombie+fighting+champions+mod+apkPDF 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_off0000df79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF79	11116 bytes
SHA-256: `7ae625a5691eaa2d25e7807e4e661ef7f7e3693e9e8ad1591f232896af0b2163`
`font_01_sfnt_off0000f8da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8DA	17932 bytes
SHA-256: `4a73102d5366d67a2a80e8d7399f6db5f57a3c513d961638c173d233d2020efe`
`font_02_sfnt_off0001270c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1270C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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