PDF malware analysis — malicious · 581258f9b613a2ed

MALICIOUS

PDF

86.7 KB Created: 2021-06-30 00:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 5a79dda71b9f2414e92e823683d18709 SHA-1: a3babf4eea8e9b87d1d5e5070a40b71b54611713 SHA-256: 581258f9b613a2ed00f1016f5253fed0774099c90c5727e0b86b75cd28c15a04

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an effort to obscure the final malicious destination. The presence of numerous links on disposable hosting further supports a malicious intent to distribute phishing content.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a90ed558941---62702388076.pdf In PDF document text
- https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/v89og4pce176lja8v9e5vac7q7/gabumak.pdfIn PDF document text
- http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acca35d0d49---6254107801.pdfIn PDF document text
- http://digitalpolicycouncil.com/imagenes/file/75670963740.pdfIn PDF document text
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16097935fd0a01---82232327434.pdfIn PDF document text
- http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/p91o7m2tah4d2tv8gvqvib6602/filobazekibar.pdfIn PDF document text
- https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/ad9efe57e45ba131f929416ae99ce119/vimozomewefewixapazek.pdfIn PDF document text
- https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9eb3c94781---13825837099.pdfIn PDF document text
- https://weeb.nu/userfiles/file/74548432699.pdfIn PDF document text
- http://shuimotongyuan.com/userfiles/file/vekanelilivadijevapizuxo.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/38bf12e6759ade57bcb6d568ce8e9297/vegepako.pdfIn PDF document text
- http://cn-polylysine.com/d/files/48684293172.pdfIn PDF document text
- http://mobilesamara.com/img/files/file/93363293665.pdfIn PDF document text
- https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/fc90e7bcf13bd90529b5f1e212783953/37395508207.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/b30b71a36e453e8d98c1a1337de4b641/74239169490.pdfIn PDF document text
- http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/e412d2b08c2b4f3d9c2aba2953d5b523/segus.pdfIn PDF document text
- https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/baa957c23c27c3fd8e455917f0a142d8/51944669648.pdfIn PDF document text
- https://glbtrader.com/userfiles/file/kenew.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e9dc1b1fd---vatudugip.pdfIn PDF document text
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/76ua9hg66e1q79hpmsjbdeqc9i/samijedajemuzez.pdfIn PDF document text
- http://ecohost.ru/pics/images/file/5459085266.pdfIn PDF document text
- http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b353fe80df---fazenamo.pdfIn PDF document text
- http://busankid.com/webfiles/board/file///ridepume.pdfIn PDF document text
- https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/a00ae906d6eb35f83fc6f60f3eaf3456/35226767062.pdfIn PDF document text
- https://xosobacninh.vn/webroot/img/files/vonewosexejinitibeno.pdfIn PDF document text
- http://cokhibaosang.com/media/ftp/file/fatemapinaxutav.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=list+of+phrasal+verbs+with+french+translation+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_off0000edef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDEF	17936 bytes
SHA-256: `96cb80f7b59816f6213a013c53aef80d00262f282d0bcca2eabc0632d0c8bc79`
`font_01_sfnt_off00011bd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BD3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000133ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133EA	10968 bytes
SHA-256: `23252245471cbcd7d466e2836b28aa1dcb42f2b8ad97ce2fb747f259a0c0a328`

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