PDF malware analysis — malicious · 9bc23120151c4632

MALICIOUS

PDF

81.5 KB Created: 2021-09-11 19:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 80c35046576295d262b6639d3756147a SHA-1: 84e2258580684970cbb70f4a7e4444ab86074b59 SHA-256: 9bc23120151c46327f67bc873e2a4d0637eaa31e38e774cc316d41b4fd319bf7

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 part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to 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://chcial.ru/uplcv?utm_term=minecraft+interior+tutorial PDF link annotation
- http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/43002768061.pdfIn PDF document text
- https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138deb437833---kebubu.pdfIn PDF document text
- http://regalmotors-jp.com/js/upload/files/nosodefenaso.pdfIn PDF document text
- https://simbhaolipower.com/images/file/97719679757.pdfIn PDF document text
- http://yizhu580.com/ckfinder/userfiles/files/92881203828.pdfIn PDF document text
- http://brmxn.com/userfiles/file/20210910191408_df38ib.pdfIn PDF document text
- http://lavalnerina.it/userfiles/file/98799799701.pdfIn PDF document text
- http://sushiosushi.com/uploads/files/39627027980.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130331b31580---1306042633.pdfIn PDF document text
- http://cbcom.fr/ressource/site-image/files/vufupenivafafezokolo.pdfIn PDF document text
- http://pspectr.ru/userfiles/file/rodilo.pdfIn PDF document text
- http://attlas.center/userfiles/file/zutivimubexotifodomejajop.pdfIn PDF document text
- http://autoscuolemontagna.it/userfiles/files/nikubafadonafebaxer.pdfIn PDF document text
- https://xn--49st2et51duvk.com/upload/files/48769826547.pdfIn PDF document text
- https://cuatudongbinhduong.net/uploads/files/ludozokapegutijizukati.pdfIn PDF document text
- http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/38142720669.pdfIn PDF document text
- http://mitcostruttori.it/userfiles/files/53815413112.pdfIn PDF document text
- http://drivingtesttips.ie/fckeditor/userfiles/file/vewopabejiduzopibon.pdfIn PDF document text
- https://austdoorcaocap.com/upload/files/41016439080.pdfIn PDF document text
- http://topoint.cc/userfiles/fckFile/20210901102759.pdfIn PDF document text
- http://sola-brothers.com/userfiles/file/ragovogawakujovipikokibub.pdfIn PDF document text
- http://finpacecuador.com/userfiles/file/fowipipujaxemoguw.pdfIn PDF document text
- https://steammining.com/userfiles/file/260161527.pdfIn PDF document text
- https://speak82.com/_UploadFile/Images/file/vixekemeboluwuw.pdfIn PDF document text
- https://franchise-vietnam.com/app/webroot/img/files/ragovasekajoxe.pdfIn PDF document text
- https://pabxlg.com/userfiles/file/molazedixalaxilo.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_off0000dc74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC74	17192 bytes
SHA-256: `c858e75eafd8883bfc8cc89d3aafdecff77f146f8b2347a84ef039257b09d0a8`
`font_01_sfnt_off00010900.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10900	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012117.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12117	10256 bytes
SHA-256: `c045f5f1a9ae84dcbc95ac1f326da09c32309cdccd0ea20bdfb914dca2769728`

Open this report in the interactive analyzer, or submit your own file for analysis.