PDF malware analysis — malicious · f58d79076bae2e4f

MALICIOUS

PDF

89.0 KB Created: 2021-09-12 09:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: b325263f89578118726e4f4462bc87e7 SHA-1: 25dc68213e7f73a43d8ebf872e0a6c00c299e916 SHA-256: f58d79076bae2e4f8d865c25327e365327511a0e30ab4e108dfbda2f40b376ed

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous external URIs, including one pointing to 'pixomot.ru', which is likely used to host a malicious payload or redirect to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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://pixomot.ru/uplcv?utm_term=iptv+smarters+pro+has+stopped PDF link annotation
- https://asztromiskolc.hu/ckfinder/userfiles/files/73833379965.pdfIn PDF document text
- http://veraschwemmle.de/fckdata/file/gokeputugopixesewasujorev.pdfIn PDF document text
- http://objets.immoweiss.lu/userfiles/files/wafavisene.pdfIn PDF document text
- http://kurumakaitori-one.com/js/upload/files/3712027015.pdfIn PDF document text
- https://gencerenerji.com/resimler/files/15542343440.pdfIn PDF document text
- https://foursservices.com/nbloom/fckuploads/file/78657036327.pdfIn PDF document text
- http://nsk-nalogov.net/upload/files/67803879311.pdfIn PDF document text
- http://brilliantsolarpaneling.com/userfiles/file/79721108658.pdfIn PDF document text
- http://purepassion.pl/userfiles/file/17431118353.pdfIn PDF document text
- http://studiopetrilli.it/userfiles/files/fopovuxoxutevovovakigux.pdfIn PDF document text
- http://christmaslandint.com/userfiles/rosarevipatiletuti.pdfIn PDF document text
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/hs4puku0p7i1q53o8ndgbpupgm/17006404268.pdfIn PDF document text
- http://nguyenphat.com/public/default/ckeditor/files/ladipetupawagotidegadapez.pdfIn PDF document text
- https://www.marjojaspers.nl/ckfinder/userfiles/files/vemixusodosev.pdfIn PDF document text
- http://energosol.pl/images_cms/file/45224219435.pdfIn PDF document text
- http://vektor-bezpeki.com/userfiles/files/8294653527.pdfIn PDF document text
- http://enotecagaribaldi.it/userfiles/files/24693700187.pdfIn PDF document text
- http://celeb.huh.hu/UserFiles/File/xawuxuwodasarezomulazapo.pdfIn PDF document text
- https://rsun.pro/admin/ckfinder/userfiles/files/1313727557.pdfIn PDF document text
- http://ghettaetamionarchitetti.it/userfiles/files/73590894127.pdfIn PDF document text
- http://carrozzeriardue.it/userfiles/files/linudagazarezime.pdfIn PDF document text
- http://baracenter.be/userfiles/file/17628510982.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dc42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC42	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f454.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF454	17192 bytes
SHA-256: `d66e61a12bcdfadf2b41b3b4f3293b10293a170dff7f08fe02851bb1556b091c`
`font_02_sfnt_off000120a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120A1	18348 bytes
SHA-256: `56ec338484bb3b4562652bccbb9b00b29a4ea528ad8e4cb52c8d766df5daec2b`
`font_03_sfnt_off00013da6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DA6	10432 bytes
SHA-256: `50269d0b2f4a69fd15c762f6090067bca4ea186b1b79534f99ab8402376c2335`

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