PDF malware analysis — malicious · 6b6b875a07e8381c

MALICIOUS

PDF

71.7 KB Created: 2021-09-05 20:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: f985df5b49a5ceb89abc6897f5b121f2 SHA-1: 8be6b259643d5afd12da000a02972a157e1611f8 SHA-256: 6b6b875a07e8381c6e85f02fa410e7e7bc30ddbfe194a5b13625193979284d47

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, containing embedded JavaScript. It also features a link farm pointing to multiple distinct hosts, some of which are identified as compromised WordPress upload storage. The embedded JavaScript likely facilitates the redirection to these external URLs, which are used to host further malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier suspicious score 0.4683

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82f4eb5c8---gofazopusogoxexore.pdf In PDF document text
- http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/25089231648.pdfIn PDF document text
- http://lawrence-spruill.com/clients/42275/File/9778405382.pdfIn PDF document text
- http://kwong-cheong.com/userfiles/31426897462.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/lqq60u8dnmupgdpvika8nlvcka/fosufidesaj.pdfIn PDF document text
- http://capital96.com/userfiles/file/41901792625.pdfIn PDF document text
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec524dbe38---3962513587.pdfIn PDF document text
- http://www.look4job.gr/images/_user_na/file/rigijez.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a474ae5c0e4---vukevef.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ded9047b69---judapupuzomoto.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0be799a8fd---68585732457.pdfIn PDF document text
- https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/b14e5628ea1ea32c281c9cbca1f49b66/54232548481.pdfIn PDF document text
- http://hanasushichoice.com/uploads/files/6727564429.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a66c20c8aff---namujago.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/7vloke7p2kg68slbktks6jc8jc/pobox.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079669bb9537---98703006394.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/caa1cd51f57f6ebd03578e8f40fb90bc/vavevapabezokilulozif.pdfIn PDF document text
- https://perfecthospital.org/FCKeditor/file/39912753615.pdfIn PDF document text
- http://myconnect-thailand.com/image/upload/File/67660376984.pdfIn PDF document text
- http://uceng.net/_UploadFile/Images/file/65476951549.pdfIn PDF document text
- http://cisseo.net/userfiles/files/19371953606.pdfIn PDF document text
- http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/35401946102.pdfIn PDF document text
- https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab04d188a7d---84976795565.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=duplex+printing+on+fabric+pdfPDF link annotation
- 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_off0000cdd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDD9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e5eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5EB	17324 bytes
SHA-256: `0ef204ac5fc5006e798106635b86b4f93caaf4dba1dc823bfd64bfe363d8e533`

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