PDF malware analysis — malicious · 2d187161643c7b07

MALICIOUS

PDF

92.2 KB Created: 2021-07-01 09:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 0daa86ee88a0e950c23fa365db1a1647 SHA-1: b4267ab3bf8bb9f82810dd82e7ab3cf97a1b0a07 SHA-256: 2d187161643c7b07ef045fb08d7c1664e474e92d4ad9dfb5dbc0c443dd97c123

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and numerous embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

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://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/f9djtju542v1tak1fsqd6c9cn1/gekozenoxamudur.pdf In PDF document text
- http://tingyi-bnb.com/CKEdit/upload/files/9183068092.pdfIn PDF document text
- https://balbok.net/admin/ckfinder/userfiles/files/97052548750.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/kh38iihnd10j87024v3q8200ku/jenunevuza.pdfIn PDF document text
- https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/e8c7a01ef956d3919f85543d6be0ea93/85029709875.pdfIn PDF document text
- https://kisikana.hr/userfiles/file/2317344723.pdfIn PDF document text
- http://www.gabrielamaciel.net/images/content/file/fesosadowikaselo.pdfIn PDF document text
- https://powermailer.in/userfiles/file/66531777050.pdfIn PDF document text
- http://royalgoodviewresort.com/Uploads/file/nexanugajazijewitenuf.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/38698984754.pdfIn PDF document text
- https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/751a374756c690c0389189dfffb0a043/95055392500.pdfIn PDF document text
- https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/e4cjenmh7fin0krns93h8jon21/30543989000.pdfIn PDF document text
- http://flexa.cz/docs/file/72863347216.pdfIn PDF document text
- http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160870800164f5---77533072559.pdfIn PDF document text
- http://alliusie.com/userfiles/file/navebogevegudarufagalenel.pdfIn PDF document text
- https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/b30b20caf232b701a29911316590be00/ramavoxugepadel.pdfIn PDF document text
- https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/4ethqv5e2q3nk5s0n8n0qmo16c/rajinevofomivezopu.pdfIn PDF document text
- http://zeroseistudio.eu/userfiles/files/45669814671.pdfIn PDF document text
- https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085700fa205e---folejorumorakoxezuxoxegej.pdfIn PDF document text
- http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aae44132ae---1728974849.pdfIn PDF document text
- https://datajournonepal.org/files/40708652892.pdfIn PDF document text
- https://llsindia.in/FCKeditor/file/tebal.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad96ea1020e---93331413896.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160848417a6d7d---tubulig.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=blue+giant+planetPDF link annotation
- https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/09be21f226c39fd2fb07a57853484734/26329912893.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f179.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF179	10192 bytes
SHA-256: `5a0b181f795b4eb006e00c28bd24c91303bc988bff6a13d4523aad8d473bc5aa`
`font_01_sfnt_off00010862.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10862	16232 bytes
SHA-256: `338cc954a946a7fbf70b29c55d5e66db99b2ef151e94d540d22e7b387f44db23`
`font_02_sfnt_off00011e3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E3D	17252 bytes
SHA-256: `279e749075972f5d5c59105e2f936a04e65dffbf2517864250ffd4a5f2cc4261`
`font_03_sfnt_off00014b4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14B4C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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