PDF malware analysis — malicious · b03542159d9f45e4

MALICIOUS

PDF

71.7 KB Created: 2021-09-26 06:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 970858eae9f50cc4e638b6f209c22763 SHA-1: fea4704085581c6fa6b89a5d643f6d760e9d271f SHA-256: b03542159d9f45e43554feac5ac048cd14139f67466398149320079af6367a7d

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, indicating an attempt to redirect the user to malicious content or download further payloads. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JS points to T1059.007, and the nature of the file suggests it was likely delivered as a spearphishing attachment (T1566.001).

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=hack+skin+pubg PDF link annotation
- http://chicopharm.com/upload/files/norelijidiverubu.pdfIn PDF document text
- https://magicdiscoradio.com/userfiles/file/ferepaleziluzuwu.pdfIn PDF document text
- http://elcivan.com/admin/UserFiles/file/87963772141.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613535982b856---4113617233.pdfIn PDF document text
- https://wic-net.com/userfiles/file/kokinotonajomekarudusa.pdfIn PDF document text
- http://rungrawin-itt.com/userfiles/files/ditenutobiwefalawutig.pdfIn PDF document text
- http://camara.acessoainformacao.org/uploads/ckfinder/files/92161088089.pdfIn PDF document text
- http://workontext.ru/media/file/41147292792.pdfIn PDF document text
- https://pragatitic.org/ckfinder/userfiles/files/73729426325.pdfIn PDF document text
- http://dentalcenterstudio.it/userfiles/files/ganez.pdfIn PDF document text
- http://aitrans.org/UploadFile/file/F1202109011007189223.pdfIn PDF document text
- https://ienter.bg/files/rurotemadikixaripujoxozur.pdfIn PDF document text
- https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/45k1dt163jaesv7dn0tee0ak4g/bebirutafonowagebiripiw.pdfIn PDF document text
- http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/jovugeziwudonesutefapenun.pdfIn PDF document text
- http://waxiangyuan.com/upload_fck/file/2021-9-12/20210912182605535441.pdfIn PDF document text
- http://servmed.net/userfiles/file/gigiloluw.pdfIn PDF document text
- https://atlantidegattico.it/file/18864639042.pdfIn PDF document text
- http://apartmany.cucoriedka.sk/data/files/bozol.pdfIn PDF document text
- http://evola.it/userfiles/files/zedudebabunin.pdfIn PDF document text
- http://thepnguyentran.com/media/ftp/file/penebazinuvavipov.pdfIn PDF document text
- https://livnica-metalurg.com/images/pages/file/20387806015.pdfIn PDF document text
- https://luatsuavina.com/userfiles/file/25966695547.pdfIn PDF document text
- https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/38266075431.pdfIn PDF document text
- http://abwninemile.com/uploads/files/dalonutexiwurizaxul.pdfIn PDF document text
- https://orig-shop-gsm.ro/ckfinder/userfiles/files/44514979866.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_off0000b3e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB3E8	18016 bytes
SHA-256: `fb9a5182460b7898d05288c16608470fcafdceac6f6c06ff57e1914d0765db71`
`font_01_sfnt_off0000e241.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE241	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fa58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA58	10376 bytes
SHA-256: `adf4c10cab13a117415a3f2223d96e537d88501da60c34325c1dec456a163a4b`

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