PDF malware analysis — malicious · 65df60e56dde5f41

MALICIOUS

PDF

77.1 KB Created: 2021-09-15 20:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: 62003509ae66363b6cf48cf38a7f7ae7 SHA-1: 1490c9851ecf6e46156d20e0d9435e937062ac37 SHA-256: 65df60e56dde5f41c7a7d55c62e0226765abeef88ec687783dd89637692a038c

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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 http://foxhill101.com/userimages/jesiwalifuvasewawemale.pdf In PDF document text
- https://fokusmedia.com/images/uploads/11608069124.pdfIn PDF document text
- http://khunghinhdepphuctin.com/media/ftp/file/madiwebuzejokigaxarugufo.pdfIn PDF document text
- http://devison-matras.com/upload/file/lujegogepaviwozitabokokik.pdfIn PDF document text
- http://probeg2000.ru/files/userfiles/files/86826999627.pdfIn PDF document text
- https://cicimanis.com/contents/files/niburasidatoxidevo.pdfIn PDF document text
- https://konferencii.ru/js/ckfinder/userfiles/files/81865770239.pdfIn PDF document text
- http://shangrilatheshow.com/ckfinder/userfiles/files/54643045226.pdfIn PDF document text
- http://weilandensemble.nl/ckfinder/userfiles/files/91701987295.pdfIn PDF document text
- http://gesht.ru/admin/ckfinder/userfiles/files/10586722244.pdfIn PDF document text
- http://apisicul.com/userfiles/files/vimakojaxexifuvo.pdfIn PDF document text
- http://kirsanov-maslo.ru/uploads/9139544961.pdfIn PDF document text
- http://sasolution.kr/userfiles/file/kaxuv.pdfIn PDF document text
- https://deltagroup.bg/uploads/file/vapamufufoleluparubepem.pdfIn PDF document text
- https://bravo-hk.com/userfiles/file/21987292727.pdfIn PDF document text
- https://amatnieks.lv/pictures/image/10125946070.pdfIn PDF document text
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377797b50d4---49965938760.pdfIn PDF document text
- https://realxenon.ru/uploads/files/5891186546.pdfIn PDF document text
- https://cortemadera.com/wysiwygfiles/file/56230858963.pdfIn PDF document text
- http://www.niceresidence.net/image/upload/File/12645996312.pdfIn PDF document text
- http://naturabliskociebie.pl/userfiles/file/xejoxabugabufitikubobineb.pdfIn PDF document text
- http://mardeestilos.es/fotos/file/pinafuvidularavo.pdfIn PDF document text
- https://ddtoyz.com/ckfinder/userfiles/files/88026784279.pdfIn PDF document text
- https://nanyangtextile.com/userfiles/file/gosotemanowobegokeb.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+free+fire+max+downloadPDF link annotation
- 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_off0000c8c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8C1	17560 bytes
SHA-256: `ce7ded2ac4fba4d508114745973b288c49425680da10f62af9f4a71b3f25fda0`
`font_01_sfnt_off0000f67d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF67D	10528 bytes
SHA-256: `edfb62a1914eb784ff48aa0b3603b07b63a539d0bdd54a852817d719901db073`
`font_02_sfnt_off00010e70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E70	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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