PDF malware analysis — malicious · 2d015f438fda5654

MALICIOUS

PDF

73.4 KB Created: 2021-06-12 13:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 0cff72e211f178bb0580b9fdee2f6931 SHA-1: 90579ec3f9e2a91a76f7d982fcd32741342e64ff SHA-256: 2d015f438fda565447a39b081b0682a711aec0173a29cc6cb7f8d65664eb5c15

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating the document's primary purpose is to redirect users to external, potentially harmful, content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://crewmak.ru/uplcv?utm_term=launchpad+designer+tcode PDF link annotation
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/9b25f826b423d3290fcd3562f5ec6ad1/994506480.pdfIn PDF document text
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/56a80b82194c7ebf27128f4d7167f090/lumoteviwalelizowivuv.pdfIn PDF document text
- http://beiks.info/public/file/35220162829.pdfIn PDF document text
- https://beautyreviveshop.com/newerac2c/userfiles/file/6506655840.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/86fb467c1419aa3e65cc04fb948271d6/31014188331.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d01e164f---zabonevutakenibigevumovi.pdfIn PDF document text
- https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/57abea119a994a521b89ed5f74a91c97/garefizuf.pdfIn PDF document text
- http://aclamerica.com/customers/CMS-IMAGES/file/86601159095.pdfIn PDF document text
- https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/aesnqlbufgg02ma9agquu5ek82/jurimolobit.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/37nl6qhqh2fdgng8urs64euejh/12332195538.pdfIn PDF document text
- http://andlupa.com/userfiles/file/kisibawubikajanafer.pdfIn PDF document text
- http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85286e2c5---55566970205.pdfIn PDF document text
- http://tktravel.shop/FileData/ckfinder/files/20210603_8D5D52B9F76CB3D6.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa980f4b508---bezepazikujemogef.pdfIn PDF document text
- http://zpb-maciejewski.pl/upload/fck/file/8791199394.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e250.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE250	5244 bytes
SHA-256: `05607affa3719c7f91c4155f2c0c08f675add33d9de4dfade7f26fb5681b5652`
`font_01_sfnt_off0000f421.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF421	11000 bytes
SHA-256: `e8ed07f741b441a52d95246fe7d4081260245719d4775c29fcfdd80617e485f9`

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