PDF malware analysis — malicious · a1478d882483285a

MALICIOUS

PDF

68.9 KB Created: 2021-09-28 15:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: 1c1a4d93dea294a20a3be730f1ecbf4d SHA-1: 9227eb991651ae01b1765d066ce53672d3820bd4 SHA-256: a1478d882483285a94f79d13a46c67602d7bb356029cb30b2e1292520724c849

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to compromised sites. The embedded JavaScript is likely used to facilitate these redirects or exploit vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://inwebjor.ru/uplcv?utm_term=stickman+hook+apk PDF link annotation
- http://tincorner.vn/uploads/files/rizenawulibuzudidasu.pdfIn PDF document text
- http://ceraunavoltapizzeria.it/userfiles/files/zasikuxibifixipifirek.pdfIn PDF document text
- http://bjdfszwy.com/filespath/files/20210909025707.pdfIn PDF document text
- https://hotnewsmd.deca.md/upload/userfiles/files/607334124.pdfIn PDF document text
- http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/25424194304.pdfIn PDF document text
- http://sz-nuoyi.com/Upload/file/2021090913314722345.pdfIn PDF document text
- http://collegium-connect.nl/ckupload/files/dutuvivesejuzeko.pdfIn PDF document text
- http://antichigelsi.it/userfiles/files/terekijo.pdfIn PDF document text
- http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/2298038468.pdfIn PDF document text
- https://noble-program.site/js/ckfinder/userfiles/files/rubopimemujowek.pdfIn PDF document text
- https://propertiproperty.com/Uploads/userfiles/files/befufadabafa.pdfIn PDF document text
- http://szentistvanpatika.hu/upload/file/93249100676.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5cac9fd29---gupetuzekadusugo.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/67362990616.pdfIn PDF document text
- http://precedent.by/_newsite/images_from_html_editor/file/tetagusinitide.pdfIn PDF document text
- https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/5c7edc60f4958cd783f4aec3b164edcf/15454736980.pdfIn PDF document text
- http://poltinka.ru/userfiles/file/tegawigivupewagoj.pdfIn PDF document text
- https://pmfegypt.com/userfiles/files/pipebupiroxanesixow.pdfIn PDF document text
- http://styropapex.pl/userfiles/file/vagonuru.pdfIn PDF document text
- https://linkevicius.com/upload/galery/file/20290381022.pdfIn PDF document text
- http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210908162253.pdfIn PDF document text
- https://mldom.xyz/web/img/podborky/files/weviburuditumukaxirixina.pdfIn PDF document text
- http://uptindia.com/newsimages/file///tegiligirisip.pdfIn PDF document text
- https://www.tyrtaios.gr/ckfinder/userfiles/files/23017020957.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_off0000b1e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1E3	14812 bytes
SHA-256: `792b4df52fceafa953b8fe4bc2faf9f86d6c4e29c143c3a53b3d9112f9893464`
`font_01_sfnt_off0000d700.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD700	10360 bytes
SHA-256: `02cc58fb0cc603b32b7e35f8bd077e0997bb3c057318a3cb26100608f6974de4`
`font_02_sfnt_off0000ee3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE3E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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