PDF malware analysis — malicious · f2e20fbd350f99b8

MALICIOUS

PDF

83.1 KB Created: 2021-09-21 19:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 513e4dd85bdc73d96d15d0ac080137a5 SHA-1: f0df41a22bcd0d4f03d987cec35d0f8f7770e6e5 SHA-256: f2e20fbd350f99b836ec87315486f15dc4d4c7d6fc514c7847f46a69d644dc0f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, with high confidence. It contains embedded JavaScript, a common technique for executing malicious actions within PDFs. The PDF also contains numerous external URIs, including one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely redirects the user to one of these external URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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://garglob.ru/uplcv?utm_term=science+lab+apparatus+names PDF link annotation
- http://fibertechnique.com/tmp/file/wutetoboxapinipiwunuja.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5c1b9199a---22016139898.pdfIn PDF document text
- http://dspec-car.com/js/upload/files/budiparimi.pdfIn PDF document text
- http://advocaatindex.nl/images/uploads/libagibusaxomobebavopoku.pdfIn PDF document text
- https://tiguan-wiki.ru/file/zigedezupuf.pdfIn PDF document text
- https://minhgianggroup.vn/upload/files/wupapot.pdfIn PDF document text
- https://kaparatt.com/images/File/78355950579.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161445c258a1e6---nalugoveli.pdfIn PDF document text
- http://ugyvednok.hu/userfiles/file/voxuzanotilulikovowoto.pdfIn PDF document text
- http://adhunikjewellers.com/ckfinder/userfiles/files/lefipowujamaf.pdfIn PDF document text
- https://briljant-maleri.se/UserFiles/files/94524622680.pdfIn PDF document text
- http://tubietelbar.hu/uploadfile/2531497429.pdfIn PDF document text
- http://tycoonmedical.com/userfiles/file/69107128437.pdfIn PDF document text
- https://www.pactforfamilies.org/ckfinder/userfiles/files/kinimuwuxilemenubej.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/52094361971.pdfIn PDF document text
- https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/18943584965.pdfIn PDF document text
- https://haltia.mx/sii/ckfinder/userfiles/files/75824776127.pdfIn PDF document text
- https://ideylia.fr/uploads/file/fadojuvasowufuloze.pdfIn PDF document text
- https://at-studio.tw/app/webroot/userfiles/files/20210907_135112.pdfIn PDF document text
- https://vietnam-pump.com/userfiles/file/25312634435.pdfIn PDF document text
- http://king-pro.com/userfiles/files/lobesugipisakapuguso.pdfIn PDF document text
- http://russia-ex.com/images/blog/file/44320314218.pdfIn PDF document text
- http://dakov.hu/_user/file/65193256415.pdfIn PDF document text
- https://twr1115.net/files/fckeditor/file/989883247.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_off0000e03b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE03B	17904 bytes
SHA-256: `6de46c86be1819cb10c0f141e6ee8b461cf52b7ff8ecceb6019742268378d341`
`font_01_sfnt_off00010e27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E27	10732 bytes
SHA-256: `e0ded21cb15765cb4f3f0cc386ad79f7b44058b1f7d92368c5bbe01b9cb66fcb`
`font_02_sfnt_off0001268d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1268D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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