PDF malware analysis — malicious · 3c64ad954c101f83

MALICIOUS

PDF

79.0 KB Created: 2021-07-16 06:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: a7aa84f25ba766c78caede2b577f050b SHA-1: 6d3ae3b52680fdb8b37a874ec20dc5dd5ee78ed6 SHA-256: 3c64ad954c101f836072f14e5898b4a9c7fa53b0d2eefad7dc3b34aab53dee1d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to multiple distinct hosts, many of which are compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to malicious content, potentially exploiting vulnerabilities or tricking them into downloading further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.6344

Heuristics 5

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
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://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66dfb4c75b---69365866140.pdf In PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1297a5dc9c---fagexezidinoburofep.pdfIn PDF document text
- http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33c962891---nafosebufalomeret.pdfIn PDF document text
- http://ajivikafinance.com/userfiles/file/wuxewipesofonesevuluvuba.pdfIn PDF document text
- https://aneri12.eu/res/file/gubowafebotinale.pdfIn PDF document text
- https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/dd450a2780563c1248e8dc3bd4c9dc06/fatunox.pdfIn PDF document text
- https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/b13d4fe3c2983e511bd0c083cf3c195b/sademo.pdfIn PDF document text
- http://gramercy-grand.ru/files/file/sufevolelan.pdfIn PDF document text
- http://firanywiktoria.pl/uploads/editor/file/vopemixaresebalomif.pdfIn PDF document text
- http://bhttourist.com/upload/fckimagesfile/fidomebujizewifoli.pdfIn PDF document text
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/c48396c0c51392363e393e363c3f14fe/36983897576.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99f7906429---15766518555.pdfIn PDF document text
- http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/50379a02242bbfb62dd290ae301a71c4/76049614003.pdfIn PDF document text
- http://magnumprint.ru/upload/files/xuduzugureviriwaluvutare.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caa9eda1f0f---vowavazosojuzizalotu.pdfIn PDF document text
- https://prokoncept.hu/admin/blogfck/image/file/91064404896.pdfIn PDF document text
- https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/3uku661djg3ivblljo2ckgegee/75752754999.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/o3n30lb420dooa0fqpp8u4p4o7/61206648419.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/6836e69704e94cfcc0995c0af1e824d9/50190382620.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d00bc8aba29---44212603166.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+block+a+number+on+messengerPDF link annotation
- 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_off0000e391.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE391	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fba8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBA8	10892 bytes
SHA-256: `761edb3aef58df0cede151ceae23b74b84ef2d9ebfbd54ab6a5750e963a56cb8`
`font_02_sfnt_off000114f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114F2	16780 bytes
SHA-256: `3c6968fc6031eb0a4079dcb24668e8d18aca30a03bbffdb13306269c41828313`

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