PDF malware analysis — malicious · 70aa5e238bd32e9f

MALICIOUS

PDF

85.1 KB Created: 2021-09-19 10:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: e5490c3a56829acb0bf7b3533573c760 SHA-1: 5602a5f9571336ddf3ac77e0a60e025ec88f052d SHA-256: 70aa5e238bd32e9f3fa8e6ce63254deecbb657f2bc1d9ca4109250d4fa9577e8

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 it's designed to redirect users to potentially harmful websites. The presence of multiple embedded URLs further supports this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 5

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.
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://archism.ru/uplcv?utm_term=photo+editor+collage+apk PDF link annotation
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614554c623a48---kuwiforabotofavumu.pdfIn PDF document text
- https://crc.creativechange.net/ckfinder/userfiles/files/jokote.pdfIn PDF document text
- http://vatlieubaooncachnhiet.com/userfiles/file/xabiboromizejavideri.pdfIn PDF document text
- http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zinanaberedewusekurefotov.pdfIn PDF document text
- https://mgs-on-track.com/app/webroot/userfiles/file/30271348375.pdfIn PDF document text
- http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/lixavazazugi.pdfIn PDF document text
- http://thenikharvconsultancy.com/userfiles/file/8192112471.pdfIn PDF document text
- http://phutunggiahungoto.com/uploads/files/83187203272.pdfIn PDF document text
- http://erh-hu.com/userfiles/file/27530562346.pdfIn PDF document text
- http://rehahomecare.com/upload/editor/files/todixufavabu.pdfIn PDF document text
- http://ahkkpcm.org/userfiles/96566492401.pdfIn PDF document text
- http://shangrilayunnan.com/ckfinder/userfiles/files/nawowoxoxosid.pdfIn PDF document text
- http://saothienemb.com/uploads/images/files/kipebabesixonema.pdfIn PDF document text
- http://kukdae.com/files/fckeditor/file/gitaworidaruderofinaluliw.pdfIn PDF document text
- https://asthasupermarket.com/userfiles/file/73107187784.pdfIn PDF document text
- https://wupaojichangjia.com/d/files/26538353120.pdfIn PDF document text
- http://lighthouse-connection.at/myPix/file/jabimik.pdfIn PDF document text
- http://moscowfashion.net/content/xuploadimages/file/25314754560.pdfIn PDF document text
- http://elskup.pl/images/assets/file/mojuwuforikuku.pdfIn PDF document text
- https://vishalahospitality.com/ckfinder/userfiles/files/buzejuzabixadidaxola.pdfIn PDF document text
- http://idominjazz.com/fckeditor/userfiles/image/bufopojef.pdfIn PDF document text
- http://kondicionery-dzerzhinskij.ru/upload_picture/file/4288887082.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613958b2d4b6e---nakonukigemunimibume.pdfIn PDF document text
- http://onlinemidias.com/ckfinder/userfiles/files/nodamareduj.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_off0000e447.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE447	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fc5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC5E	10616 bytes
SHA-256: `77739970634d5e124b76f0f9502cb3165c3e37e412f62faa8061d623cf0843e7`
`font_02_sfnt_off00011488.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11488	18916 bytes
SHA-256: `1e1c156e494d52c30ede42d7f488d79b1567e28d28d00fa82d02e6f20129d7c7`

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