PDF malware analysis — malicious · 2c26a914a2604902

MALICIOUS

PDF

70.8 KB Created: 2021-10-07 00:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20

MD5: 9ebe629dbb4008469d18c21627ae8d5a SHA-1: 68f5c85ec62ccd10a0c88c8bca02bb5b28e727dd SHA-256: 2c26a914a26049023bd94396193353b692d8599b97b11ab4109b04bb4740ad4f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript and multiple external URIs, indicating it's likely used for phishing or to download further malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a large number of links to disposable hosting, reinforcing the phishing lure.

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://archism.ru/uplcv?utm_term=i+hope+you+will+understand PDF link annotation
- http://khmim.com/ckfinder/userfiles/files/1746689891.pdfIn PDF document text
- https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb2ffa64b0---60970262458.pdfIn PDF document text
- http://finalstage.biz/js/upload/files/96112436522.pdfIn PDF document text
- https://villanakarin.com/userfiles/files/milokimujenitutozuwon.pdfIn PDF document text
- https://alcoquimicos.com/ckfinder/userfiles/files/melotitulitaz.pdfIn PDF document text
- https://elitstroycraft.ru/source/file/22342379965.pdfIn PDF document text
- http://nikolabartakova.cz/files/file/pakutefasewizalimegosa.pdfIn PDF document text
- http://logo4you.dk/userfiles/file/ralabutejotizevoxesamu.pdfIn PDF document text
- http://hydrogears.com/survey/userfiles/files/zeludosanuxel.pdfIn PDF document text
- https://tw-itemaos.com/ckfinder/userfiles/files/41039179370.pdfIn PDF document text
- http://carlaschroyen.com/content_docs/sesejanoxidotasebivip.pdfIn PDF document text
- https://hoatuoi360.vn/uploads/files/54329977844.pdfIn PDF document text
- http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/14502914697.pdfIn PDF document text
- https://e-motorcycle.tw/upload/emotorcycle/files/doseretumamanikixa.pdfIn PDF document text
- http://burelomdo.com/ckfinder/userfiles/files/nerirurivipi.pdfIn PDF document text
- http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16137f202e6e9c---renixezunosulex.pdfIn PDF document text
- https://webmakler.org/userfiles/file/73745594428.pdfIn PDF document text
- https://draw.pt/home/drawpt/images-editor/file/vepuwunetotetasexalo.pdfIn PDF document text
- http://naturabliskociebie.pl/userfiles/file/kisobisemovudatu.pdfIn PDF document text
- http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/jegutavodifawigajusetas.pdfIn PDF document text
- https://aviatroglo.fr/IMG/file/48237514608.pdfIn PDF document text
- http://zagazzo.com/userfiles/file/63844113534.pdfIn PDF document text
- https://braus.uz/images/shared/file/ladorimemapoj.pdfIn PDF document text
- http://studiotipaldo.com/userfiles/files/23655188599.pdfIn PDF document text
- http://www.cst.rnu.tn/js/ckfinder/userfiles/files/31725106413.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_off0000b3cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB3CB	16544 bytes
SHA-256: `3112d6fbf1d6aaa12b1cf05d579ff1b057ea4f6a0c7f0e8c4ec70270cffc5a59`
`font_01_sfnt_off0000dd47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD47	10740 bytes
SHA-256: `401c88f3f1d6675f5fdf9b7b520c3d29f8ce146aa15c19856609e5947fc59b39`
`font_02_sfnt_off0000f5f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5F8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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