PDF malware analysis — malicious · 18a380878f8f590f

MALICIOUS

PDF

87.4 KB Created: 2021-06-29 21:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: e3b404483e53f4fa1dc7cadd8c9a2683 SHA-1: d7eb0a699ca9473ca6c8279139a8e36be64493ff SHA-256: 18a380878f8f590f6e6f78207378ca6c442ec3664f498a0d5483022e92e94b2c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://huntic.ru/uplcv?utm_term=feet+hot+and+burning PDF link annotation
- http://varosom.hu/userfiles/files/92593251708.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16073937ac1c98---48944269610.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072aaf31678a---40952393840.pdfIn PDF document text
- https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/759a6a0t92dfqs4nfk1tnj49p3/41272722644.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ad3247c6f---razinagugi.pdfIn PDF document text
- http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca942e6b97---talanavusimupezemu.pdfIn PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8cd0a61e42---78412014890.pdfIn PDF document text
- https://ndmoyun.com/calisma2/files/uploads/tejapivu.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160864f497863d---69372716887.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/08d6d059d323635377cb8364133dd4dd/92985559056.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/44838963728.pdfIn PDF document text
- https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/b2e98b3a06a07509d8ce9c9e192baeac/garakiriti.pdfIn PDF document text
- https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/3vm78rf0ld4nck7hkmpni8frf4/gobipobojezixuriwejateje.pdfIn PDF document text
- https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/c12d4d08b2cd12f988fc5e68f6aaa728/3313221429.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5449a34ae---3475600152.pdfIn PDF document text
- https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab842f3cad6---82922047485.pdfIn PDF document text
- http://classicalgardenfountains.com/uplds/file/41549905796.pdfIn PDF document text
- http://www.klimavill.com//data/editorfile/kovudawikimol.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/8669ecf8a23674344f8cd6ba9585fb11/fiwakapulasawuba.pdfIn PDF document text
- http://xn--aknmedikal-yub.com/uploads/file/76371772946.pdfIn PDF document text
- http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5170fb629d---jarogedufonaxevadowotoba.pdfIn PDF document text
- https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/002574d9a2b79fb3466629fc807ef1d5/57134833990.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b76389c8750---zobenawujewipur.pdfIn PDF document text
- https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832973188ef---zetatimodisutogifedutok.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96e6e65d64---mugojizuxoxalusefonelutam.pdfIn PDF document text
- https://mahae.hu/files/files/3335061677.pdfIn PDF document text
- http://clipsttm.com/userfiles/file///70438627423.pdfIn PDF document text
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93f963523c---76420038732.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f38d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF38D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010b9f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B9F	17032 bytes
SHA-256: `bdedb0a18d951eda8e793c934c8b5d341e3f5e0ef32607bba2dd477a97b192ec`
`font_02_sfnt_off00013855.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13855	10528 bytes
SHA-256: `bc96606d42aea88461875147fe1e84224d3f3b9d1bf2e7adbf7ba7fd58107b50`

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