PDF malware analysis — malicious · fd53a6827d1be47d

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 00:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 62432d6227df070d6b03f80dd3e063d8 SHA-1: 47be4ba51e26b0528e50ceff50658e8800ee59ec SHA-256: fd53a6827d1be47d5a8a1f61b8da71ea77ef2cd7b0bd658f783c0cfb82bc150a

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://medvor.ru/uplcv?utm_term=how+to+watch+tv+for+free+on+firestick PDF link annotation
- https://mkontakt.pl/dat/file/wipibaze.pdfIn PDF document text
- http://aallergy.netlovestories.com/upload/files/70691207476.pdfIn PDF document text
- https://madame-tina.com/ckfinder/userfiles/files/kofolukotixud.pdfIn PDF document text
- http://begemot-rus.com/uploadfiles/file/2021090316282273499.pdfIn PDF document text
- http://mestav.sk/uploaded_images/file/68109009892.pdfIn PDF document text
- https://grouptm2.com/contents/files/rupixigaguxebefuja.pdfIn PDF document text
- http://scuderieverdina.it/scuderia/userfiles/file/rurovigo.pdfIn PDF document text
- http://talleresjpg.es/img/file/92342791811.pdfIn PDF document text
- http://airmon.hu/images/files/86581226569.pdfIn PDF document text
- http://ajtoablakcentrum.com/_user/file/pamatos.pdfIn PDF document text
- http://montoaneli.com/ckfinder/files/53334211433.pdfIn PDF document text
- http://kaizenlife.com/ckfinder/userfiles/files/potobajirawonizowof.pdfIn PDF document text
- http://cementfeet.com/userfiles/file/wepudiwomovo.pdfIn PDF document text
- http://pamatudarbai.lt/ckfinder/userfiles/files/13256505449.pdfIn PDF document text
- http://clinicaveterinariasangiacomo.it/userfiles/files/jafapef.pdfIn PDF document text
- http://khocabien.com/uploads/files/sekebi.pdfIn PDF document text
- http://chinajnbt.com/images/upload/File/36396558446.pdfIn PDF document text
- http://stphilomenaonline.org/userfiles/file/66778285555.pdfIn PDF document text
- http://vidol.nl/userfiles/file/90681535768.pdfIn PDF document text
- http://baschin-heizung.de/meineBilderAlbertGrundschule/file/25877425233.pdfIn PDF document text
- http://henanshuangxin.com/d/files/xobasapagen.pdfIn PDF document text
- https://granitabrasive.ro/editor_up/60138957185.pdfIn PDF document text
- http://ip-golubev.ru/ckfinder/userfiles/files/58962871355.pdfIn PDF document text
- https://u-spot.biz/js/ckfinder/userfiles/files/43525015914.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2e5756c1f---27265335067.pdfIn PDF document text
- http://ecosdaliberdade.com/ckfinder/userfiles/files/kelalajavu.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_off0000da81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA81	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f298.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF298	10620 bytes
SHA-256: `838109917052747270b35574b2912788bb008679ae022d86f927b421f67e8c81`
`font_02_sfnt_off00010ae3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AE3	18916 bytes
SHA-256: `eeb0f1c44a537c17ce22aa267db32e8c05f89bb5353e2a9b39ae45f430bb3ff1`

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