PDF malware analysis — malicious · 094104f4a2e52245

MALICIOUS

PDF

88.3 KB Created: 2021-07-20 23:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 0d9130d47ed267900ff25ac70d2ca669 SHA-1: 6e75d3aabbc3db12f8c1d88be6ff6a0a315ccdad SHA-256: 094104f4a2e52245efef244b6e19f3305fbf2c7b1c2b8bde79ba34c66290f23f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting sites. These links are likely intended to lure users to malicious websites for further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://www.siposferenc.hu/html/67815412787.pdf In PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/fd457627687df2ab3328d48db3620f49/2078378006.pdfIn PDF document text
- https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/1bb3492174579c938bd457a0ba492860/diribajiniwotitisidawetu.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/j6j440rv6i2l4h3t09k4ch0cf1/bunenokidepinisukuz.pdfIn PDF document text
- http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf74d2ccc0---lejuxelituzof.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/35f3a4a6d8e8d2728743840d48e67036/74490803312.pdfIn PDF document text
- https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc28812b7---dajanote.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922538107b3---18704864280.pdfIn PDF document text
- https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/f7123f3ca367cb86dcf6d40245a23136/xosawovusubeko.pdfIn PDF document text
- https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/02168252b098b4602a3b9fbc0a812292/jejoxun.pdfIn PDF document text
- https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/38b3510664f93631ab2c4557cb7fc202/wizolitapabi.pdfIn PDF document text
- http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/zirizoratirilariteru.pdfIn PDF document text
- http://stepsforstarlight.com/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/61167465571.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/selogabuf.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd95628a2c---tadonefadukutasasumuguv.pdfIn PDF document text
- http://scottleddy.net/clients/862555/File/goturikevirinuwokuro.pdfIn PDF document text
- https://powermailer.in/userfiles/file/nezewigevazaxanotez.pdfIn PDF document text
- https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ea77496c1---besufolopuxilonolafaderod.pdfIn PDF document text
- https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ls749itnp8hq32gb6i9ff9pp23/fuzasejefurunofokaz.pdfIn PDF document text
- http://euro-ex.com/images/blog//file/57713232387.pdfIn PDF document text
- http://hosungtour.com/FileData/ckfinder/files/20210527_8985D1DFEFD78FEB.pdfIn PDF document text
- https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a584253d9f---28812877452.pdfIn PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b332a53be7---dujuvusepat.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e6a065b1aba---xexixigixukafo.pdfIn PDF document text
- http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75309a959e---suxurizowuguwiwitej.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=cold+clammy+hands+and+feet+babyPDF 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_off0000f5d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5D3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010de5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DE5	17192 bytes
SHA-256: `c19e3483f8db5b45d21f4cc188ee70b4786c983855535d6d7084022a6cbe50cf`
`font_02_sfnt_off00013ae2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13AE2	10832 bytes
SHA-256: `e22959770ebee8c8eb61e222a0e6b1e96b8a9900e7b2144d665b0de0df139f50`

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