PDF malware analysis — malicious · adf7014f5468af67

MALICIOUS

PDF

78.9 KB Created: 2021-09-02 06:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 8a8f33373d3fbcaf6624ea1abc2f8bbe SHA-1: 08da3d81dee1475285989f321fc018813f0e21c1 SHA-256: adf7014f5468af6754a2ecbbfe6df64790da7e2c9f80972dfd9e221809eca027

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous external URLs, many of which are hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the URLs suggests a potential for JavaScript execution or redirection to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.5017

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://philabc.ru/uplcv?utm_term=two+conditions+caused+by+hyperthermia PDF link annotation
- http://chiengthai.com/file_media/file_image/file/wamosakitadoletu.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfe7d0fc03---ribakokinid.pdfIn PDF document text
- https://mangonebike.com/uploads/file/2255567140.pdfIn PDF document text
- http://www.autoservis-hubatka.cz/admin/upload/ww/file/fopop.pdfIn PDF document text
- http://anaminfo.com/attachfile/file/volokupanejejomonedis.pdfIn PDF document text
- http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610f3d8b9405c---25169317867.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ad32aa215---7396589757.pdfIn PDF document text
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceb4c702b0---63837782265.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/4426e3f26218cba7aeb818c53641f9ec/2271887227.pdfIn PDF document text
- http://theprintfactoryvietnam.com/uploads/files/nipinerepapa.pdfIn PDF document text
- http://tehnicgaz.eu/files/file/kilazilokin.pdfIn PDF document text
- https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/u14fds8hs9hp7eu4lqi2q6a8m4/28063612287.pdfIn PDF document text
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2a904b903af5151dffb69b9ceb5ac50d/pijomedosakuxupunipote.pdfIn PDF document text
- http://handbook.hu/upload/page/file/34475366821.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7b6d75a8b---rajebozifu.pdfIn PDF document text
- http://bertolinacare.it/file/76848856097.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/589fa33faa536b1ffe256235b173fb43/67400386960.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a3040eb8629---87264431204.pdfIn PDF document text
- https://monyetjoget.com/contents/files/zuwavetebifoxila.pdfIn PDF document text
- http://sweed-trans.eu/ckfinder/userfiles/files/72468096989.pdfIn PDF document text
- http://eotp.info/sites/default/files/fck/file/fitesomim.pdfIn PDF document text
- https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/cc7d6450272cba9b5efc4ee18b09ac70/39864570770.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e31d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE31D	17924 bytes
SHA-256: `5eaa9c6dc54e65b7a994735ff34f08de7a8816d29fd8846b598cec2884b3be8a`
`font_01_sfnt_off00011105.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11105	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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