PDF malware analysis — malicious · af0a273ac36f47c8

MALICIOUS

PDF

80.2 KB Created: 2021-09-13 09:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: b6b49592504fec55390a079571bc66f9 SHA-1: 37591dd36ae7c2daf140d7eccf13fabb1ff99a73 SHA-256: af0a273ac36f47c8184e7c222b8caad284c7e60ff5810c5be91f2088f69d3c46

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

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://deitratech.com/userfiles/file/98557848701.pdf In PDF document text
- http://farashimirooz.com/files/tuposegedawifevuladugor.pdfIn PDF document text
- http://permanentnimakeup-brno.cz/userfiles/files/6225028889.pdfIn PDF document text
- http://theeultimatenetworker.com/ckfinder/userfiles/files/vaperutegavit.pdfIn PDF document text
- http://greatwalledmond.com/ckfinder/userfiles/files/givavuw.pdfIn PDF document text
- http://eternaseguros.net/files/files/laramagisuxivujunoso.pdfIn PDF document text
- http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/62891351662.pdfIn PDF document text
- http://lonerangerfanclub.com/ckfinder/userfiles/files/1621328374.pdfIn PDF document text
- http://sicilyontable.it/userfiles/files/jojatoritasuwefugati.pdfIn PDF document text
- https://transmilenio.net/datamont/userfiles/file/saposiwasuwigezededubak.pdfIn PDF document text
- http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95257799155.pdfIn PDF document text
- https://solturism.ro/images/file/xikatemenanudokusag.pdfIn PDF document text
- http://jiachuankeji.com/upload_fck/file/2021-9-8/20210908015728940586.pdfIn PDF document text
- http://erfaspot.com/resimler/files/majerox.pdfIn PDF document text
- http://irvinenott.co.uk/ckfinder/userfiles/files/30329532236.pdfIn PDF document text
- https://livre-art.com/ckfinder/userfiles/files/filizuno.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2d84619cd---vumegawilodarudanezokava.pdfIn PDF document text
- https://sardavetri.it/userfiles/file/zenusijamugawifijojusug.pdfIn PDF document text
- http://baobianhkhang.com/upload/files/16997838518.pdfIn PDF document text
- http://purel-biopharm.com/upload/files/rekogugugif.pdfIn PDF document text
- http://les-dvorik.ru/userfiles/file/munotej.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=windows+7+iso+rarPDF link annotation
- https://mediacentre.aerlingus.com/js/ckfinder/userfiles/files/9915661384.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_off0000d69b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD69B	10096 bytes
SHA-256: `68d5a2c3cd0e6ebe043b0716b7c2201beef167b21a61bc01e93a8db75151cffe`
`font_01_sfnt_off0000ed45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED45	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010557.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10557	17632 bytes
SHA-256: `fcc26f6596a8aff6ee991cacc8dde5cd0caf94f9c95464d26aa046d18e377458`

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