PDF malware analysis — malicious · 604beff728ccd18f

MALICIOUS

PDF

64.2 KB Created: 2021-09-29 06:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03

MD5: 33e752f097cd808fb4f4fc36dff6c83e SHA-1: c55c2f0bb734360d582e5f16d77b94f2d38928d1 SHA-256: 604beff728ccd18f692ecfcc7ab6cf1e03c460add2724ed916d36e65b4600bc6

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate maliciousness. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The presence of external URIs and the link farm heuristic strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.6133

Heuristics 4

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
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://chcial.ru/uplcv?utm_term=download+bike+racing+3d PDF link annotation
- http://husplaza.hu/editor_up/62624238976.pdfIn PDF document text
- https://ermolino.mebel18.com/uploads/files/loxubetovekesesamo.pdfIn PDF document text
- https://www.abrasco.org.br/ckfinder/userfiles/files/witekotasupinalo.pdfIn PDF document text
- http://pkynfe.net/userfiles/file/65402488158.pdfIn PDF document text
- http://srtcivilnorth.com/ckeditor_file/files/fisogapevebera.pdfIn PDF document text
- http://vtvxm.vn/userfiles/file/vitozabib.pdfIn PDF document text
- http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/a2f5ddf426afeea9d42651ad27dde7c7/migoludazurot.pdfIn PDF document text
- http://fairfresh.net/assets/admin/ckeditorimage/files/63376834532.pdfIn PDF document text
- http://parmalab.it/userfiles/files/76253909799.pdfIn PDF document text
- http://hyunsin.net/userfiles/file/96804074890.pdfIn PDF document text
- http://nensi.si/upload/file/6634909228.pdfIn PDF document text
- http://doremimarlikinsaat.com/userfiles/file/91710737726.pdfIn PDF document text
- http://szyqjsj.com/UploadFile/file/20210924040357599.pdfIn PDF document text
- http://factorycontrolprojects.com/userfiles/file/pekifol.pdfIn PDF document text
- http://www.fonfe.com/uploads/files/jesupemerogajigimamizef.pdfIn PDF document text
- https://basealimentare.it/webroot/files/fck_uploads/File/54792701004.pdfIn PDF document text
- https://weishinclinic.com/uploads/files/202109130208525916.pdfIn PDF document text
- http://mimarkamilozkartal.com/userfiles/files/6372463959.pdfIn PDF document text
- http://banner-ever.com/ckImg/files/robuwakuvemanekosesid.pdfIn PDF document text
- http://athaj2.specialty-match.com/upload/files/72505696630.pdfIn PDF document text
- http://denda.co.kr/ckfinder/userfiles/files/vutexaxaxulemodu.pdfIn PDF document text
- https://almondzwealth.com/administrator/imagetemp/file/71525131686.pdfIn 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_off0000abf0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xABF0	15216 bytes
SHA-256: `8303ea366cdf8d2b42e15dc6b45b8bac348ee6af2f73d922464b3b92ff348a46`
`font_01_sfnt_off0000d27d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD27D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ea94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA94	10768 bytes
SHA-256: `35eb8987f94b17f54ca82dcfbdaf83c9b3a4ab276140062d6f13247c0833efa8`

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