PDF malware analysis — malicious · 63c908324f6271e7

MALICIOUS

PDF

91.3 KB Created: 2021-09-19 02:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 284289b17bbe650c29c538c54401bceb SHA-1: 886618d613b8e4e6cb35f3f7bf404b8fbf93f36b SHA-256: 63c908324f6271e797e3b145ba8134222d17dbb1d5332f6ecd77acc7dea12394

142 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, identified by heuristics, which is a common technique for executing malicious code within documents. This script likely redirects the user to external URLs, such as the identified `drafthe.ru` domain, which is indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
JavaScript action low 1 related finding PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://drafthe.ru/uplcv?utm_term=gomovies+free+movies+online PDF link annotation
- https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/57668003217.pdfIn PDF document text
- http://uteambio.com/upload/files/jolemazixuzojanozi.pdfIn PDF document text
- http://ristoranteibucanieri.it/userfiles/files/soduliwevivivolesek.pdfIn PDF document text
- http://hastensandbreakfast.nl/userfiles/file/faxovuxasawabatesakik.pdfIn PDF document text
- http://archiprojektai.lt/app/webroot/uploads/userfiles/files/lowiroripiwuwug.pdfIn PDF document text
- http://anindecor.pl/files/file/folajosurewu.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ebcb60225---pozakazejusutufodaseja.pdfIn PDF document text
- http://karlsbach.de/userfiles/files/nexolina.pdfIn PDF document text
- http://goldmustang.ru/files/files/21609240862.pdfIn PDF document text
- http://eapver.com/upload/ckimg/files/202109170751351284.pdfIn PDF document text
- http://moscow-vernisage.com/files/files/ledidujarojawipe.pdfIn PDF document text
- https://maurinet.com/userfiles/file/dafatujanezemagexovojadap.pdfIn PDF document text
- http://chinasoftcore.com/userfiles/file///18527575695.pdfIn PDF document text
- http://neuroxl.com/images/file/zamufilav.pdfIn PDF document text
- https://thuaphatlaihanoi.net/uploads/files/vozeliwinekatodu.pdfIn PDF document text
- https://gppacdatabase.net/userfiles/file/bivikeduruvalexi.pdfIn PDF document text
- http://consol.hu/images/uploadedimages/file/24586597809.pdfIn PDF document text
- https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/19800471225.pdfIn PDF document text
- http://x-site.by/upload/editor/files/47032924897.pdfIn PDF document text
- http://ekogamma.pl/javascript/ckfinder/userfiles/files/51208935889.pdfIn PDF document text
- https://chung-pei.com/userfiles/file/kamobilalit.pdfIn PDF document text
- https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130527fab884---zopofo.pdfIn PDF document text
- http://shanghaiqingchen.com/upload/files/sagukiro.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_off0000ff2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF2F	19212 bytes
SHA-256: `14be22735d8c4234a75ec09ebfd8f78e4fcaccd4f6ad52d3d801bca0bfd64776`
`font_01_sfnt_off00013103.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13103	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001491a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1491A	10220 bytes
SHA-256: `39d1dd8c32c8a52f59a49f8c95bfcf3649e3791060a2852988a2e144baa7b4f6`

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