PDF malware analysis — malicious · efa0217757d96ce4

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 04:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: d93afbc8d495d1e406ff19971be401c8 SHA-1: 93c52801a109d8b333e0f399f8e3ef5b366ed349 SHA-256: efa0217757d96ce418464c73507e80d9af28e80e38fd4cf2d4aa9d02f6d3fae3

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of 'cmdt36ll0/wunobisejokusakegizu.pdf' in the document text, alongside a URL, indicates an attempt to execute commands or lead the user to a malicious resource.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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://cezartravel.hu/userfiles/file/rikuzuborukisige.pdf In PDF document text
- http://szyldkj.com/luodan/images/userfiles/file/30542095304.pdfIn PDF document text
- http://studiomarcheluzzo.it/userfiles/files/48744685352.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1611a2e5c8268f---48400580257.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161223d48bea94---dovimefanudiwufanovig.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9329798be---59616935506.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f24bebdbba---vizazejujijemirukavujaz.pdfIn PDF document text
- http://www.ktgroup.co.uk/ckfinder/userfiles/files/67486418988.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4aa15e974---xukiwug.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6bba7105d6bb2ec1190d840f5dd71004/terajigujo.pdfIn PDF document text
- http://coimbra.hu/uploads/ckfinder/userfiles/files/4513970675.pdfIn PDF document text
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/sud7tn4u19k1d1he7cmdt36ll0/wunobisejokusakegizu.pdfIn PDF document text
- https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/f2bf24566875dae74b6bbb4a2837794f/repetepokujog.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/1c405c455a04ee465ec18f6b039d5e7f/bederuzesupugetamagazupus.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6809a0a84---gejaxekejuso.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/c1b6bf5460433869c8c4b33d06b4503a/gotilapo.pdfIn PDF document text
- http://laulumaja.fi/ckfinder/userfiles/files/fulonanamuzepemodu.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd931f72a02---61160014979.pdfIn PDF document text
- https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/7085336f5d781683d16849e215adc3c3/puruto.pdfIn PDF document text
- https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/c353ffd017ac49d828d625f5ebb60e3f/xibesafozoto.pdfIn PDF document text
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969017a8a15---68957284729.pdfIn PDF document text
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/9d5im4ibd9pjede202p4hfcgt5/zepefofibegup.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/46a6fe1dc7eea6a1694fb485ee8613e4/xoxisomavefuwuzomufuj.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/dc679e125b237d06b9c956da6b9101c9/3668482098.pdfIn PDF document text
- http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/1019cjr8rdk7isb9rjno8k1fuu/zirevode.pdfIn PDF document text
- https://sellerflows.com/wIn macro / runtime command snippet
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=letter+d+tracing+worksheetsPDF 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_off0000d3cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3CF	17976 bytes
SHA-256: `06153dc1186685f8452b2dc4db90a253d8d0df50f5eab9898e86cbdd950b3ada`
`font_01_sfnt_off00010217.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10217	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011a2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A2E	10736 bytes
SHA-256: `97172794f9f95240b815248439e0b7bb5532c29a08f9ebe1f10a4ca0a75009d7`

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