PDF malware analysis — malicious · 3b5a325e701b40cb

MALICIOUS

PDF

78.2 KB Created: 2021-09-19 02:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 7c1ca47d4bde39fbea31512190856273 SHA-1: 9030821f7a170b477ea3bff5920a3adec18e2832 SHA-256: 3b5a325e701b40cb2a9bdeb1aee09fb5b802e89e3601061ea3c59ee1a0e14460

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting and are part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to obfuscate the malicious links or perform further actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 6

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.
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://krisoc.ru/uplcv?utm_term=secret+folder+for+android PDF link annotation
- http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16140c2ee20470---17649881283.pdfIn PDF document text
- http://problemconsulting.com/img/download/files/kileg.pdfIn PDF document text
- https://oasis-travel.ro/files/86174555578.pdfIn PDF document text
- http://wgadget.com/file_media/file_image/file/92631928126.pdfIn PDF document text
- https://gcr.goldcrownresort.com/magazine_files/files/3869204740.pdfIn PDF document text
- http://cherryontop.pl/upload/fotki/file/mafawov.pdfIn PDF document text
- http://snft.ro/media/file/91117934229.pdfIn PDF document text
- https://ceiling.holcom.vn/webroot/img/files/4688055240.pdfIn PDF document text
- http://www.ishvani.com/www/js/ckfinder/userfiles/files/rawenimu.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b30b62069b---badezixeworukuz.pdfIn PDF document text
- http://av72-reklama.ru/userfiles/file/16313106887bcc2c7c6c4813425267.pdfIn PDF document text
- https://topinsolventa.ro/userfiles/file/nupepekubinugi.pdfIn PDF document text
- https://nsck-cykelmotion.dk/userfiles/file/75101074952.pdfIn PDF document text
- https://viessmannboilers.ca/fck_upload/file/56650645983.pdfIn PDF document text
- https://pnp-studio.com/fckeditorfiles/file/gogodidamusol.pdfIn PDF document text
- https://baobiachau.com/luutru/files/35640449662.pdfIn PDF document text
- http://olympiad-bigben.ru/ckfinder/userfiles/files/44219612125.pdfIn PDF document text
- http://kisito.com/userfiles/file/37069468135.pdfIn PDF document text
- http://axiomestates.com/userfiles/file/zepezivotezomunexinovivez.pdfIn PDF document text
- https://cecprint.com/images/file/petupumor.pdfIn PDF document text
- http://resumesfromabove.com/userfiles/file/xatika.pdfIn PDF document text
- http://phongthuydotho.vn/upload/files/13942851021.pdfIn PDF document text
- https://bozoklar.org/ckfinder/userfiles/files/40611790035.pdfIn PDF document text
- http://tulga.ru/editor/files/68259716481.pdfIn PDF document text
- http://www.cda.org.hk/ckfinder/userfiles/files/84677345384.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_off0000ce71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE71	10376 bytes
SHA-256: `82dc0d632c569fd852cff8770df913ee53ab094f52f6d20617c9543f871989b1`
`font_01_sfnt_off0000e5fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5FE	17444 bytes
SHA-256: `773c8d66f1719adb3a54c5561bfbafe31f0be72a65f45c4829a91ff22df7e361`
`font_02_sfnt_off00011357.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11357	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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