PDF malware analysis — malicious · e1a946e5e68d5cc8

MALICIOUS

PDF

78.3 KB Created: 2021-09-20 18:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 1c28c1d3b3d798d3b8745c2dc1cf4a90 SHA-1: 459d13cb67e55e5fe7a41ae6d8667d7aca297749 SHA-256: e1a946e5e68d5cc8f97d1dc0dcea9b3b641c74116f5c90864fdc0e29e2e6cf25

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.8980

Heuristics 4

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.
External URI info PDF_URI

PDF contains an external URL action
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://smidgel.ru/uplcv?utm_term=vishnu+sahasranamavali+kannada+pdf PDF link annotation
- http://oticonshop.com/ckfinder/userfiles/files/29332617321.pdfIn PDF document text
- https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/63ae0731ca6d5edaf069b1fa25361af8/376830961.pdfIn PDF document text
- http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sevejosipatemugadi.pdfIn PDF document text
- http://mamolenasnc.it/userfiles/files/wosep.pdfIn PDF document text
- http://motocams.cz/ckfinder/userfiles/files/98449020820.pdfIn PDF document text
- http://directartdeal.com/uploaded_files/userfiles/files/gexix.pdfIn PDF document text
- http://ucg-eg.com/userfiles/file/burexikixoxufopiluvom.pdfIn PDF document text
- https://cemb.ca/upload/editor/file/fuxes.pdfIn PDF document text
- https://ashasuchikala.com/ckfinder/userfiles/files/gaxodesozi.pdfIn PDF document text
- http://pure-chiral.com/upload/files/41320678798.pdfIn PDF document text
- https://hasekei.jp/userfiles/file/xovekamu.pdfIn PDF document text
- http://cck-brno.cz/ckfinder/userfiles/files/51524661089.pdfIn PDF document text
- http://ytlcases.com/userfiles/file/zavesigedowazuzaxunuv.pdfIn PDF document text
- http://finadev-groupe.com/userfiles/file/dozufoxejemalet.pdfIn PDF document text
- https://ostrichpharmaceuticals.com/userfiles/file/23905898658.pdfIn PDF document text
- http://robbes.nl/media/files/favulizanes.pdfIn PDF document text
- https://akgoz.zemta.com/uploads/files/zaragemepuzuruxuvuzexizu.pdfIn PDF document text
- http://como.gattinonimondodivacanze.it/themes/userfiles/files/48964787579.pdfIn PDF document text
- http://1carl.com/userfiles/file/81043892026.pdfIn PDF document text
- http://nc-israel.ru/upload/files/38723900251.pdfIn PDF document text
- https://www.uflo.edu.ar/ckfinder/archivos/documentos/55352732736.pdfIn PDF document text
- http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132c867df564---36382791718.pdfIn PDF document text
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16134618dc0c91---sawakazemota.pdfIn 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_off0000c6c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6C0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ded2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDED2	21740 bytes
SHA-256: `ed63d947deecc85d7c7b05abc2e49da5937be6ca6cceb09e0a504759eb31c3b3`
`font_02_sfnt_off0001185d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1185D	10640 bytes
SHA-256: `f1b9262b47dd104d8eb957f56ac9128416761849f1738b817cda86846bc0dd53`

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