PDF malware analysis — malicious · a514da9ac6ad256f

MALICIOUS

PDF

72.9 KB Created: 2021-09-28 07:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 0f8e46aa0bc6578c887c8000821f61b8 SHA-1: d194ae526a18f827a9faeb2a5346b487e80f6e8c SHA-256: a514da9ac6ad256f097f0c97feb6c9de4c3f16f7d4dc0a12eeab73362ca5e9bc

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. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to external URLs, as evidenced by the PDF_URI and EMBEDDED_URL heuristics, which are often used for phishing or downloading 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://terremeraude.com/userfiles/file/83525075654.pdf In PDF document text
- https://arhometutor.com/userfiles/file/76865356295.pdfIn PDF document text
- https://fotofidelity.cz/userfiles/file/72559610527.pdfIn PDF document text
- http://gz-theoutfit.com/UploadFiles/FCKeditor/20210904152339.pdfIn PDF document text
- http://sasmedm.com/www/js/ckfinder/userfiles/files/pudajejutebopuxime.pdfIn PDF document text
- http://brilsports.ro/userfiles/file///pabusagugawoto.pdfIn PDF document text
- http://interiorconsignments.com/media/file/tovumopukida.pdfIn PDF document text
- http://massageindex.nl/images/uploads/dezaloj.pdfIn PDF document text
- http://3e3i.com/UserFiles/file///tomemapekupigivid.pdfIn PDF document text
- http://helderlive.nl/ckfinder/userfiles/files/67310003163.pdfIn PDF document text
- http://nicenpos.com/userData/board/file/6505731051.pdfIn PDF document text
- http://fillaracingacademy.cz/ckfinder/userfiles/files/21540003532.pdfIn PDF document text
- https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/98082336329.pdfIn PDF document text
- https://hotelmitrutarija.com/uploaded/files/67681828555.pdfIn PDF document text
- http://intemhathanh.com/img_duhoc/files/bimodukujema.pdfIn PDF document text
- http://cioccolatogallucci.it/userfiles/file/78607819354.pdfIn PDF document text
- https://projektovanje.info/userfiles/file/16808285881.pdfIn PDF document text
- http://esistore.com/userfiles/file/vimijuvezifaxotawenunapuf.pdfIn PDF document text
- http://mynotary.ca/sites/all/sites/mynotary.ca/files/73405653798.pdfIn PDF document text
- https://ustunbilgisayar.com/userfiles/files/51644695160.pdfIn PDF document text
- https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/niwoju.pdfIn PDF document text
- https://easternresources.net/ckfinder/userfiles/files/wilalinimefifimerigezob.pdfIn PDF document text
- http://kcpsystem.com/userData/board/file/bitokij.pdfIn PDF document text
- http://kibunajcc.com/ckfinder/userfiles/files/punobulixizupofulomexaf.pdfIn PDF document text
- http://autosvilar.com/uploads/ckfinder/files/tebiwewivebinonewabakava.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=no+ads+mx+playerPDF 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_off0000b829.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB829	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d040.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD040	10452 bytes
SHA-256: `012ad24109ed8dce4bc6ace303d6dfea9c802cd55cedc6ed05d25334a012f6dc`
`font_02_sfnt_off0000e7fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7FE	17996 bytes
SHA-256: `69a786ad084f61cc8af81cb258dd029d18432ec05a30c94ff9e2eaeb193ecc1f`

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