PDF malware analysis — malicious · e6f88c7129012d6b

MALICIOUS

PDF

80.2 KB Created: 2021-09-01 09:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 81889bb4dec92bc25f72fbd7721e0fae SHA-1: 211ca7663af9c30cf4ee01bc8080227acf035b6b SHA-256: e6f88c7129012d6bdbad7aa27a05c27daefbeed243467664bfbb0f7dd4487ec7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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 http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cc8e0947f---dasekoguje.pdf In PDF document text
- https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/69b23a4201b92a3ec05ce7dee96d84af/xivetotajokukat.pdfIn PDF document text
- https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/3390c3a6c91c52dc33db95c0c7d89c78/kakenapoku.pdfIn PDF document text
- http://ifa-astrologie.de/userfiles/file/zadikejuwarakekariziluf.pdfIn PDF document text
- http://iccj.jp/images/uploads/fckeditor/file/22874229920.pdfIn PDF document text
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/efef8ce69d4372462686729b712889fe/4537121915.pdfIn PDF document text
- http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/97980722850.pdfIn PDF document text
- https://ksboutlet.com/file/files/zedipukuvakebifi.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7507cb95bc---19696365484.pdfIn PDF document text
- http://parbatsamajjapan.com/img/files/files/tiguparavegej.pdfIn PDF document text
- https://open-call.fr/uploaded/files/xebogaxumakuwomavutob.pdfIn PDF document text
- https://cfi-registration.org/buzzboxgift/img/userfiles/files/79004626125.pdfIn PDF document text
- http://grandp.ru/userfiles/file/jugakinoweropiromul.pdfIn PDF document text
- https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/d689ad94fb865589c69e10fc153f5faa/23029083448.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084111b63435---55151877853.pdfIn PDF document text
- http://clingac.com/d/files/40720196614.pdfIn PDF document text
- https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/3vj3has9h2ccepv4bdisamm1rd/turezasibafusemukikolalu.pdfIn PDF document text
- http://npi-management.com/ressource/site-image/files/50521238379.pdfIn PDF document text
- https://syteq-pro.com/userfiles/file/71421375742.pdfIn PDF document text
- https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/ba16c4332853072ec8a08181837aa7bd/2636014782.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a7bbc591cf02f4d2461ffde88b90f11b/72653741433.pdfIn PDF document text
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac80cfb50b5---sumiseguf.pdfIn PDF document text
- https://abofahed.com/userfiles/file/2918601653.pdfIn PDF document text
- https://tonmathunglan.vn/upload/files/kekamo.pdfIn PDF document text
- http://degeninhotel.ru/admin/ckfinder/userfiles/files/rizowapudipodepa.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=maintain+meaning+in+arabicPDF 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_off0000c7f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7F5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e007.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE007	22224 bytes
SHA-256: `5742253c924bac48b21ab0c12a1ffbd01b6f56eaf59b09fec1c4faee6c39dab3`
`font_02_sfnt_off0001195b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1195B	10372 bytes
SHA-256: `826619483d78a4b9537b35f516fcd525bead5a58d845c2c8d894774ddbb52a87`

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