PDF malware analysis — malicious · 46ec02ce8a0f12ce

MALICIOUS

PDF

70.7 KB Created: 2021-09-10 19:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: d3515a789689a565392e1ae855492043 SHA-1: 7010a8505b1016210d6965d5e51a340161c9dcb9 SHA-256: 46ec02ce8a0f12cec3a94a6bd7763864ebf9dbc6a3c50c1d6a18d16c19c3d23c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms, many hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9916

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.
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://ketchas.ru/uplcv?utm_term=corvus+poco+x3 PDF link annotation
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/vsgscjp236c5g8vta6ahqh4us4/50518216937.pdfIn PDF document text
- https://talenthunt.biz/userfiles/file/didanox.pdfIn PDF document text
- http://studiomarcheluzzo.it/userfiles/files/taregofa.pdfIn PDF document text
- http://jrpst.pl/userfiles/file/zajixedetigoribifagov.pdfIn PDF document text
- https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/7618302242.pdfIn PDF document text
- https://beta.nhatthiengroup.com/files/uploaded/files/lenejixim.pdfIn PDF document text
- http://nhuaduongnhapkhauaz.info/upload/files/6512024235.pdfIn PDF document text
- http://fusheng-vietnam.vn/admin/webroot/upload/image/files/mewinula.pdfIn PDF document text
- https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/64cd086445c209b7a04b805f20747cf0/liseguxotorufesaxuduk.pdfIn PDF document text
- https://kuraniterbiye.com/resimler/files/65809722358.pdfIn PDF document text
- http://trevelsi.ru/ckfinder/userfiles/files/42560981548.pdfIn PDF document text
- http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613718556d8d3---84759109506.pdfIn PDF document text
- http://ephtour.com/FileData/ckfinder/files/20210901_683BE185DB5801DC.pdfIn PDF document text
- http://saddabro.com/userfiles/file/dapapalafaja.pdfIn PDF document text
- http://naoshima-habitant.com/images/blog/file/wupatuminolavuxolim.pdfIn PDF document text
- https://iuoshili.com/upload/users/files/50417527248.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613775ea29674---98868761256.pdfIn PDF document text
- https://franchisefarm.franchiseharbor.com/files/files/tosokejureribi.pdfIn PDF document text
- http://wieswioska.pl/userfiles/file/wekewexulodemimagevudono.pdfIn PDF document text
- http://kapalishakti.com/ckfinder/userfiles/files/bovumipogipu.pdfIn PDF document text
- http://aow.infogestnet.it/ckfinder/userfiles/files/18464834566.pdfIn PDF document text
- https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/q2nh464fm561qgr1jfqth23daa/veziwagezakasafewetafev.pdfIn PDF document text
- https://alternativecarrepair.nl/userfiles/file/63060706646.pdfIn PDF document text
- http://yoron.net/up/files/33881265671.pdfIn PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613645a85ec1b---nexegiluxezav.pdfIn PDF document text
- http://architettipassarinmarzotto.com/userfiles/files/2477158891.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_off0000b62f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB62F	15540 bytes
SHA-256: `5976c55f9b7ddf035aafae089bf654766c24decc9762efddd37dbc5e7ec57808`
`font_01_sfnt_off0000ddcb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDCB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f5e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5E2	10204 bytes
SHA-256: `3f03f23f4d2e8eb17e4f46c3cee437a9d1415b54dd6cd17dea246980e2d26270`

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