PDF malware analysis — malicious · 1e05aa8e718edf96

MALICIOUS

PDF

75.0 KB Created: 2021-09-26 02:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 51cbdc50c4c8221a8d21df1a83b6e1b5 SHA-1: 9e4308b1394383d8e0fecd0b84c2fd951713c31c SHA-256: 1e05aa8e718edf963ec951a4cbee162e6e4e8cd5b3d9ef6cac7c4e843658e690

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to external URLs, as suggested by the PDF_URI and EMBEDDED_URL heuristics, which are often used in phishing or malware delivery schemes.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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 http://krevue.cz/UserFiles/File/xabisinanapobewojez.pdf In PDF document text
- https://olamare.com/img/uploaded/file/ziretuwodofot.pdfIn PDF document text
- https://globaltranslation.com/demo/global_translation/beta/userfiles/files/41824781507.pdfIn PDF document text
- http://oxigensupplies.com/shipinc/userfiles/files/gewidudefuguxaxikufazusip.pdfIn PDF document text
- http://levne-pohary.cz/UserFiles/File/2990141432.pdfIn PDF document text
- http://onyx-innovations.com/assets/ckfinder/userfiles/files/42120872930.pdfIn PDF document text
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149db63a7818---27055990965.pdfIn PDF document text
- https://www.mnogotrop.com/ckfinder/userfiles/files/49849807848.pdfIn PDF document text
- http://maihome.hu/admin1/file/68989068278.pdfIn PDF document text
- http://xn--b1adcbbai1bezln.xn--p1ai/content/File/rumemilamowifazu.pdfIn PDF document text
- https://galerieportelouise.be/userfiles/files/49061414210.pdfIn PDF document text
- http://kbinteriery.cz/userfiles/file/38049700697.pdfIn PDF document text
- http://dulichgiahy.com/upload/file/59873543354.pdfIn PDF document text
- https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/vitefozik.pdfIn PDF document text
- http://innotec-industrie.be/userfiles/file/japovajaxanixotevik.pdfIn PDF document text
- http://deborahkay.com/ckfinder/userfiles/files/puvudufojoso.pdfIn PDF document text
- http://hydrogears.com/survey/userfiles/files/97762228423.pdfIn PDF document text
- http://flairpens.ru/uploads/files/kakefigor.pdfIn PDF document text
- http://www.impactit.in/ckfinder/userfiles/files/kolowosesovivibozojebepud.pdfIn PDF document text
- https://fanaf.com/article_ressources/file/96087753649.pdfIn PDF document text
- https://acrgroup.nl/userfiles/file/49082948192.pdfIn PDF document text
- https://www.pharmawell.eu/ckfinder/userfiles/files/59934507568.pdfIn PDF document text
- http://studiosiciliani.eu/userfiles/files/20694651348.pdfIn PDF document text
- http://all-premium.com/user_file/files/6602597342.pdfIn PDF document text
- http://suurelepa.ee/data/file/molatujufajurunabibezuzu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=wallpaper+android+kerenPDF link annotation
- 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_off0000bd18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBD18	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d52f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD52F	10204 bytes
SHA-256: `dea08ecaaf22f63cc8fb3d44ed5c72b0b82d04bf457fe499ad97342ef18ee7e7`
`font_02_sfnt_off0000ec0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC0C	19492 bytes
SHA-256: `faac01a6c14b842215015c80a4b0209cc9dee4b11392ab7d5a89884d5fcdc32e`

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