PDF malware analysis — malicious · df4fb913e8a34a8d

MALICIOUS

PDF

77.3 KB Created: 2021-09-12 01:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 6ef8ad6fd854e0373e86bef24683893b SHA-1: d83cb46a20d0da9c1a0863f71877c755284738ee SHA-256: df4fb913e8a34a8de44f74382cf309862d2250058c447ca24283457197359450

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://huntic.ru/uplcv?utm_term=tron+legacy+tamilyogi PDF link annotation
- https://carlojans.com/cms/file/9363166189.pdfIn PDF document text
- https://renteci.com/imagens/file/78701468379.pdfIn PDF document text
- http://rivebistro.net/ckfinder/userfiles/files/13297742105.pdfIn PDF document text
- http://turskazka.ru/ckfinder/userfiles/files/99438935124.pdfIn PDF document text
- http://asesorgubernamental.com/images/file/54261413094.pdfIn PDF document text
- http://studiotecnicopetrillo.eu/userfiles/files/52003191159.pdfIn PDF document text
- http://esejsc.com/upload/files/wigebezoginu.pdfIn PDF document text
- https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/renemiguzuzakifenowozadeg.pdfIn PDF document text
- https://hoavily.com/uploads/files/27014513957.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1ab79a177---45952081344.pdfIn PDF document text
- http://w-mill.jp/images/file/68397078811.pdfIn PDF document text
- http://agro-partner.com/Image/files/negajopajumijinuvuxetux.pdfIn PDF document text
- https://quatden.vn/webroot/img/files/62324570740.pdfIn PDF document text
- http://harposwebdesign.nl/app/webroot/files/userfiles/files/kazexuweruwo.pdfIn PDF document text
- https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/susulunof.pdfIn PDF document text
- http://tubelessons.net/cms_images/file/18253037607.pdfIn PDF document text
- http://biznesfishki.ru/files/userfiles/files/relasotiw.pdfIn PDF document text
- http://support-cmu.com/filedata/file/jinubulelas.pdfIn PDF document text
- https://eco-translation.ca/upload/editor/file/65767597139.pdfIn PDF document text
- http://constantemails.com/userfiles/file/1631394269sodutewoledilelafon.pdfIn PDF document text
- http://eia-edu.com/userfiles/file/88167650261.pdfIn PDF document text
- http://xz-brand.com/ckfinder/userfiles/files/kutimumowonoruda.pdfIn PDF document text
- https://habibitoursegypt.com/ckfinder/userfiles/files/97760155298.pdfIn PDF document text
- https://doina.md/fckeditorfiles/file/jaboridivo.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_off0000cd94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD94	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e5a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5A6	16280 bytes
SHA-256: `5e285157df23623173dd809390938a31c21d318424183956f70779efa3937a37`
`font_02_sfnt_off00010fd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FD9	10480 bytes
SHA-256: `ab2edb3208309ac620aaf50332aeb12cdaea2f0fa9d2ad1a9d5574f6d7bc31ca`

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