PDF malware analysis — malicious · 17a12efbca574cac

MALICIOUS

PDF

114.1 KB Created: 2021-08-07 22:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 3353df519360649a22c134fb9e46f3a4 SHA-1: 4f44e3180d6b2ce076a95e5f59adbafaf60f55ea SHA-256: 17a12efbca574caccb58f31f9a734f57e8e785327e88ef67147b4b59c54ee78f

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious content. The heuristics indicate that the PDF acts as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains. These URLs likely serve as landing pages for phishing attempts or to download further malicious payloads. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.5879

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://huntic.ru/uplcv?utm_term=la+experiencia+starbucks+joseph+michelli+pdf PDF link annotation
- http://shengyaweb.com/uploadfile/file/2021072409444995.pdfIn PDF document text
- http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868260e9a20---25989002527.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/3d5b9d1f3288693bd92494b8b314e510/78040444247.pdfIn PDF document text
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/5ab9ce70e967ab460ac6806ed79f717f/gikepovevuduwunuzukaved.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/lcs3mahp5v94oke2lh1k7s9eo8/2208426504.pdfIn PDF document text
- http://simonkuehner.de/gfx/userfiles/files/jigivifimosaza.pdfIn PDF document text
- http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/7386563514.pdfIn PDF document text
- http://xhiehchin.com/Xhieh_News/_file/fugebixakixef.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947714c8446---85571642289.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/bb388a0ed9856c2a0be25d4588dbd030/zububujuzonufezafigavo.pdfIn PDF document text
- https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/3f25bfb9c60f376031c6168a987d9531/50269991009.pdfIn PDF document text
- http://floral-design-lindgens.de/userfiles/file/burolizenuriloranijuju.pdfIn PDF document text
- http://www.leasebridge.com/CKUPimg/files/mivelolenujoxenuzawab.pdfIn PDF document text
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/2jkst7j2rh044tlin16fus8kas/66029863101.pdfIn PDF document text
- http://iziusb.com/userfiles//file/juxatamozanifus.pdfIn PDF document text
- http://innotec-industrie.be/userfiles/file/92215546244.pdfIn PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3ae016808---91940959989.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/dae392db43317c114cbafd8d4e9a767a/47910470701.pdfIn PDF document text
- https://chambredhotes-savoie.com/ckfinder/userfiles/files/varalowaxu.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/c233387658cef8743a7d42d2b81e9168/73447663048.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dec0f4f3e19a45700cdcfbffa0e63f64/vutaxunotemexosuraxugup.pdfIn PDF document text
- http://51-lq.com/userfiles/file///wisunujagon.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74a838b806.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079dc977d80d---bamuzupowatuboveroxopiton.pdfIn PDF document text
- https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/kobebasag.pdfIn 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_off0001660a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1660A	11404 bytes
SHA-256: `58f1fcc201981cf209b9bac559a72828a2578381882cf9bda9e6b8af40e5138e`
`font_01_sfnt_off00018084.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18084	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00019896.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19896	19024 bytes
SHA-256: `2099d8245403f3bd85f9fe6389311ecf98b79fcd0e9343a14c1974b0e621f495`

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