PDF malware analysis — malicious · fe64bd72cd31c01a

MALICIOUS

PDF

70.7 KB Created: 2021-09-28 05:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: fd17d29b3bdc7890c67c5684d1494104 SHA-1: db4b1fa8de2083d2c0ff5042332baebf187e5e40 SHA-256: fe64bd72cd31c01aed5d0522b3c731e06b4619ec448934486b6b9c1c93ec7a43

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to execute malicious actions or redirect users. The presence of numerous URLs, including those pointing to compromised CMS upload directories and disposable hosting, suggests a link farm designed to obscure the final destination and potentially distribute phishing lures or malware. The PDF's structure and the embedded JavaScript strongly suggest it's intended to be delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9916

Heuristics 7

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
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://inwebjor.ru/uplcv?utm_term=demon+slayer+movie+subtitle+download PDF link annotation
- http://architettotoma.it/userfiles/files/11704636348.pdfIn PDF document text
- https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/82264517615.pdfIn PDF document text
- https://everywheregenes.com/uploadfile/qu26_qu106_com/files/90196451957.pdfIn PDF document text
- https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/249d6a2fa8c99076a9e260ce2edebab4/julimuba.pdfIn PDF document text
- http://phrabat.net/UserFiles/File/67359880533.pdfIn PDF document text
- https://resttour.com/images/userfiles/files/54609579599.pdfIn PDF document text
- https://vili-al.com/uploads/wysiwyg/files/neniwututemut.pdfIn PDF document text
- https://magicdiscoradio.hu/userfiles/file/vujedexaxutitovowuz.pdfIn PDF document text
- http://glassick.com/userfiles/file/7772889309.pdfIn PDF document text
- http://ronaldtan.nl/images/photo/lenone.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1eba94884---73078526308.pdfIn PDF document text
- http://topaslt.com/userfiles/file/lebavurixa.pdfIn PDF document text
- https://ferropula.hr/files/43486184925.pdfIn PDF document text
- https://alohasafaris.com/files/lonerupixuxoguxebixad.pdfIn PDF document text
- http://hotechike.com/files/files/kaperinojuregemogavope.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b30cca9736---setisewadubikaxor.pdfIn PDF document text
- http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/2b849e8b770ac589b065772aee2f9b78/fafuraborogetajum.pdfIn PDF document text
- https://ceccarbotosani.ro/userfiles/file/14925727266.pdfIn PDF document text
- https://ratodua.com/contents/files/zinarabawenimamiteloxaj.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/161489141ab888---43915683772.pdfIn PDF document text
- https://jmtours.co/aym_image/files/jizesovepa.pdfIn PDF document text
- http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45336191487.pdfIn PDF document text
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16137218924e5a---73162126439.pdfIn PDF document text
- https://kalimati.in/userfiles/file/47984006642.pdfIn PDF document text
- https://imad0c0.com/js/ckfinder/userfiles/files/10143689087.pdfIn PDF document text
- http://assytekservizi.com/userfiles/files/keromimu.pdfIn PDF document text
- 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_off0000b596.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB596	15012 bytes
SHA-256: `2d4d3b8702284273f512c8a872260c12221e908d3caf61d3f69125df96b30cba`
`font_01_sfnt_off0000db45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB45	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f35c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF35C	10916 bytes
SHA-256: `aa96719662a45921dbec9046ccdb997f7bca878db9e150a78ca6491031bc002d`

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