PDF malware analysis — malicious · 9c6cc0bb2ec9d651

MALICIOUS

PDF

84.6 KB Created: 2021-09-04 03:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 383b1ee26b693fb4be8174dabc24942d SHA-1: a5cc46497627ffe3608a6c2a561e580c3194e528 SHA-256: 9c6cc0bb2ec9d651d75f881a3fcd3a9c9e7094d1cc02b9a175987caca9ddeee9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to external PDF files hosted on compromised websites or disposable domains. This pattern is commonly used to distribute phishing content or further malware stages.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

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://local-atlas.ru/userfiles/files/54227737304.pdf In PDF document text
- http://marcus-1.com/FileData/ckfinder/files/20210608_DB94E0FBFD2A3C9C.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/cl10jf99qrr6hmh26mt5gr0ka2/lufikewuxaperojaxezit.pdfIn PDF document text
- http://acpiindia.com/userfiles/file/24384393528.pdfIn PDF document text
- https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/f6c4c117de7d91798088e725f67f96f6/43046149717.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/2cff50fad9a47b4458fdbf857560b4d5/35730993023.pdfIn PDF document text
- http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/80215576526.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7e823315f3ccb6bb5e4f2a077abdc961/dopovotisobexepigox.pdfIn PDF document text
- http://gabortech.com/admin/file/tutugakuvogaxigujeluluwe.pdfIn PDF document text
- http://www.vinoplaza.nl/img/upload/files/2901955997.pdfIn PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ur0jpvm041u4na9lep1sl18geh/95722094141.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715c963e710---17925291256.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d66c53a966a---2990679687.pdfIn PDF document text
- https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/a885a415668198e4cc105ff2a962c82d/siwevi.pdfIn PDF document text
- https://tungafilm.com/dorceiys/ckfinder/userfiles/files/ragugizubuzojevimuzopu.pdfIn PDF document text
- http://aucoindeshalles.fr/menu/file/nivopares.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e4e68ccdc---67104046692.pdfIn PDF document text
- http://www.toptehnik.si/images/26946586361.pdfIn PDF document text
- http://airelimpio.mx/img/editor/file/48924360344.pdfIn PDF document text
- http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608763fb13f02---nulaxowixivudafetetu.pdfIn PDF document text
- https://mehreganimaging.com/images/upload/files/levabogupa.pdfIn PDF document text
- http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092395bebe22---xokaxedebugadevekodamik.pdfIn PDF document text
- http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca06cc389bd---meragun.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a407ebe6324---10626698191.pdfIn PDF document text
- http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160766d5d1541a---18683270701.pdfIn PDF document text
- http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7786003b9b---22139715219.pdfIn PDF document text
- https://parkettworld.com/upload/files/lizuv.pdfIn PDF document text
- http://www.vljainandco.com/userfiles/files/59781115016.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=tennis+elbow+pt+exercises+pdfPDF link annotation
- 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_off0000e758.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE758	10744 bytes
SHA-256: `68289f6b6ed2cc2343a248abf9d7161587a0c7290acd426d06795e87bd1dc7d2`
`font_01_sfnt_off00010005.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10005	16980 bytes
SHA-256: `c94b2e3341b8d47a13959e4bd501d24a970df3e04d838df01a390a0826fd52b3`
`font_02_sfnt_off00012bfa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BFA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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