PDF malware analysis — malicious · f5df32cf71c94bc5

MALICIOUS

PDF

68.5 KB Created: 2021-09-30 13:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: b3f12c6273eb6e0cbe612c1d89ff26ca SHA-1: 06c5a26c7b9eb3ebc868307542d5d190c53c436f SHA-256: f5df32cf71c94bc558f8adf6612f0e569f5c07d92fb9e61c66ff050a40951739

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. This script likely redirects the user to external URLs, such as the identified `queure.ru` domain, which are often used for phishing or distributing further malware. The heuristic firings and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

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://queure.ru/uplcv?utm_term=cinema+hd+download+link PDF link annotation
- https://aquaprosmart.com/userfiles/files/ropozagaresojodi.pdfIn PDF document text
- https://karlholmbygg.se/UserFiles/files/jamajomudowolidipikadeg.pdfIn PDF document text
- https://tideandtigers.com/ckfinder/userfiles/files/67976346071.pdfIn PDF document text
- https://ourlady-schools2.com/userfiles/files/vukifumipidetopa.pdfIn PDF document text
- http://www.jasfec.com/imgs/uploads/kigikeguwafexuxinus.pdfIn PDF document text
- http://epoch-making.jp/js/upload/files/wamoselujotorofotejibu.pdfIn PDF document text
- http://hijoin.hu/editor_up/56693523648.pdfIn PDF document text
- http://sdes.in/uploads/namenozaso.pdfIn PDF document text
- http://adveotec.com/img/file/2627319035.pdfIn PDF document text
- https://ev-owners.jp/userfiles/files/naxajem.pdfIn PDF document text
- https://www.peltonfell.org.uk/ckfinder/userfiles/files/vodavotovexubigoge.pdfIn PDF document text
- https://universitecentrale.net/uploads/FCK_files/file/xoribilezevutoful.pdfIn PDF document text
- http://ykzn8.com/upfiles/editor/files/votezoleroketulefedix.pdfIn PDF document text
- http://turinhotelcompany.com/userfiles/files/32277260169.pdfIn PDF document text
- http://csc-020.com/userfiles/file/20210913234352_l36xkn.pdfIn PDF document text
- http://euro-ex.net/images/blog/file/tiverojafokudubasad.pdfIn PDF document text
- http://faisaltowel.com/survey/userfiles/files/pironaxuvafajixikawopen.pdfIn PDF document text
- https://crc.creativechange.net/ckfinder/userfiles/files/xowimoreti.pdfIn PDF document text
- http://firmen-bekleidung.at/userfiles/file/45543711686.pdfIn PDF document text
- http://showplus.ae/userfiles/files/somupewepejixekij.pdfIn PDF document text
- https://surupaceanu.ro/ckfinder/userfiles/files/41590880793.pdfIn PDF document text
- http://silverspringabw.com/uploads/files/2093812278.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148f3d5afa49---95176463168.pdfIn PDF document text
- https://christianklein.eu/Quansis/ckfinder/userfiles/files/xuforonigomudiru.pdfIn PDF document text
- http://nollve.com/img/editor/image/file/86842279075.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_off0000afa9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAFA9	14976 bytes
SHA-256: `46cae1a5ab2a2d38a5133b3e2f25f208bd8e9b4b297520794b166e0701d66822`
`font_01_sfnt_off0000d547.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD547	10356 bytes
SHA-256: `1de0970370201c9296a059389f86d11a216a987d32fd158b3ecae4a8d1988f0d`
`font_02_sfnt_off0000ec78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC78	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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