PDF malware analysis — malicious · 247d0b123ab538c7

MALICIOUS

PDF

68.7 KB Created: 2021-09-24 13:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 9ee1f90471e4a0af74c3bd7a00b0b7e8 SHA-1: c5808fc09115083952b0584f7a83d3fd6ce6989d SHA-256: 247d0b123ab538c7a298b14841e1fadfa5835885d86e5f54b83f183ec8257fad

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains and are likely used to host malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users through a network of sites. The ML classifier and ClamAV detection further confirm its malicious nature, indicating it's likely a phishing or trojan distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://nomylo.ru/uplcv?utm_term=top+ten+free+movie+streaming+sites PDF link annotation
- https://12shio4.com/contents/files/xefabug.pdfIn PDF document text
- https://xn--interpeas-r6a.es/upload/files/75033307816.pdfIn PDF document text
- http://ahkjt.com/upfile/file/16341865786.pdfIn PDF document text
- http://giaodantanthaison.com/Images_upload/files/67976035427.pdfIn PDF document text
- https://khachsan295doson.vn/namthuan/images/news/files/desivarumelakesukoko.pdfIn PDF document text
- http://controldellaves.com/app/webroot/arxius/file/tidokigibusatonaw.pdfIn PDF document text
- https://irepairplus.nl/app/webroot/files/userfiles/files/59048306209.pdfIn PDF document text
- https://avenue102.com/uploads/file/52056210617.pdfIn PDF document text
- http://heninrealty.com/userfiles/files/47579792039.pdfIn PDF document text
- https://orderpoet.com/ckfinder/userfiles/files/japanudoweveparise.pdfIn PDF document text
- https://spheresignal.com/app/webroot/userfiles/files/13054041073.pdfIn PDF document text
- http://oldmotorsclub.com/files/file/68502729165.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412fad7d0f5---venosizarezat.pdfIn PDF document text
- https://searchlink.org/userfiles/file/lojagavebifumejiwu.pdfIn PDF document text
- http://dlabiura.kbo.pl/ckfinder/userfiles/files/76556002475.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/a845faeb159e04ef16b25c25639b7b48/guwevolofe.pdfIn PDF document text
- https://ceramicasvillaflor.cl/UserFiles/File/51718120269.pdfIn PDF document text
- http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/lazetejijowotebetobi.pdfIn PDF document text
- https://jpjplumbingandheating.com/FCKeditor/file/42955259939.pdfIn PDF document text
- https://gs-hemeringen.de/ablage/userfiles/files/pametujefokarikaf.pdfIn PDF document text
- http://transbur.ru/admin/ckfinder/userfiles/files/mizizebonatonudaj.pdfIn PDF document text
- https://angelsstaff.com/uploads/file/vesuforifafikekuxugus.pdfIn PDF document text
- http://tichdiem.surecare.vn/uploads/userfiles/file/58218336552.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_off0000ae63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAE63	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c67a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC67A	10684 bytes
SHA-256: `3e718e78d7ad3ff81cad90b24a2e6e283faf5c4dac93952f05c216ced91df589`
`font_02_sfnt_off0000df0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF0A	15220 bytes
SHA-256: `db6e3828c22ba4af46c76ad8c89db7c61761a279e66807e3680414118a4e6bdb`

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