PDF malware analysis — malicious · 7096e353ca4f78f0

MALICIOUS

PDF

87.2 KB Created: 2021-06-29 02:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 102f8af06968acc3480bf3f71b7e8bfd SHA-1: 99ef21aa91bd027c95aec5db14c581576c5bfece SHA-256: 7096e353ca4f78f08fcd70c2897df9771545ae6b2787da2cfa2ffbe3a93ec461

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8bdca56bf6fd0ace8259b324b4991c51/fawof.pdf In PDF document text
- http://dajuicebarus.com/uploads/files/saripifiposavapatebu.pdfIn PDF document text
- http://ceomit.com/fckupload/file/80939135989.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/o94dd7toh1l6r4f9ptr7na8lc4/68995797845.pdfIn PDF document text
- https://schmitz.cz/res/file/likeno.pdfIn PDF document text
- https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/13df79d30241a2cf3952d9ce52193be6/tefibovuvumuzawose.pdfIn PDF document text
- https://mauspro.net/upload/files/binomiluxujoj.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c07ea09cf---6471547844.pdfIn PDF document text
- http://ampletrekking.com/userfiles/file/zibijazike.pdfIn PDF document text
- https://conexkarvan.com/cache/fck_files/file/xetelodopiva.pdfIn PDF document text
- http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d69e27820---34742450903.pdfIn PDF document text
- http://cnhhgj.com/upfiles/userfiles/file/nafujaxofoloduzeratosipan.pdfIn PDF document text
- https://parklanehotel.asia/userfiles/file/jasipapaxedapo.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d2542edad---38754255845.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/2314a0a5d63bc2df97f7f40770e3c088/kesilosu.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607411f48023e---89640329833.pdfIn PDF document text
- http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/pekemudiziro.pdfIn PDF document text
- https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/553fe6ed239a7629636097c8129fc7f4/35597025208.pdfIn PDF document text
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/2e0053a3f09fc8344155c93788652d58/73397692274.pdfIn PDF document text
- http://bioident.pl/photos_fck/file/43159629111.pdfIn PDF document text
- https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/d2cd066b1da2b545f7487a4a923694e0/kazejesurara.pdfIn PDF document text
- http://frezerovka.by/images/fxeditor/file/13652441776.pdfIn PDF document text
- http://logiccpacma.com/ckfinder/userfiles/files/popajuluwagi.pdfIn PDF document text
- http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/d5315a706dcc013236dffdeb5868609a/99684069222.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160759da810d90---pobubigugumasile.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cpe+past+papers+pdfPDF 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_off0000ef59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF59	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001076b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1076B	18976 bytes
SHA-256: `4c1e6179d10250434df807013e094cabf2f14c91e68ee6cd0a85079e607f205e`
`font_02_sfnt_off000138df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x138DF	10160 bytes
SHA-256: `14adf6bcfc7329ddd2bf55b35a68a4dad269ad8bb6d4584b8196d581e2e29bcd`

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