PDF malware analysis — malicious · 2251065458fd78f6

MALICIOUS

PDF

74.6 KB Created: 2021-09-15 17:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 0340140d43b8168395921de26d5ed8ae SHA-1: 7ed7609eade041832baec9c4f10a11288b20c048 SHA-256: 2251065458fd78f63a53734025adab094af95c868aa870338e3d55816de52b3b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of JavaScript suggests an attempt to exploit PDF vulnerabilities or redirect the user.

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://www.gonouvellezelande.com/files/46530976460.pdf In PDF document text
- http://pilot-market.ru/new/files/file/pawusatafumerelimisurufog.pdfIn PDF document text
- https://www.privathospitaletkollund.com/ckfinder/userfiles/files/21685055125.pdfIn PDF document text
- http://doanekeyes.com/userfiles/docs/85726915226.pdfIn PDF document text
- https://bcbc3399.com/upload/files/milafisojebikuxobi.pdfIn PDF document text
- http://marchmont.ru/imgs/file/11702932862.pdfIn PDF document text
- http://potlista.com/file/files/domevulajufoz.pdfIn PDF document text
- https://tidurmalam2.com/contents/files/41709126453.pdfIn PDF document text
- http://cukrarska-vyroba.cz/UserFiles/File/12759101495.pdfIn PDF document text
- https://spheresignal.com/app/webroot/userfiles/files/3845352700.pdfIn PDF document text
- https://eagleegg5k.com/ckfinder/triplebuserfiles/file/49118711177.pdfIn PDF document text
- https://bachson.net/upload/file/98155558183.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132a4d72ff20---sapelibubibepirujo.pdfIn PDF document text
- https://mrdak.cc/uploadfile/files/nedexawoxu.pdfIn PDF document text
- http://louisamerino.com/userfiles/file/fafawigebomitujufusituje.pdfIn PDF document text
- http://sjmhospital.org/files/js/ckfinder/userfiles/files/39618067440.pdfIn PDF document text
- http://asacnfservices.com/ckfinder/userfiles/files/84485848676.pdfIn PDF document text
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/1164e85bfc1e0d8ee0a92359463d8102/ziposuf.pdfIn PDF document text
- http://cristal-in.fr/userfiles/file/maxudifakuregu.pdfIn PDF document text
- http://haciogullari.com/depo/sayfaresim/file/rubarudowoxukobapexoz.pdfIn PDF document text
- http://tilestone-pools.com/i/File/54267781143.pdfIn PDF document text
- https://jphotographyllc.com/userfiles/file/6676845625.pdfIn PDF document text
- https://ozmutludokum.com/userfiles/file/46201705355.pdfIn PDF document text
- http://hiroshima-teishaku.com/userfiles/file/mosodi.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=santa+claus+worksheet+pdfPDF 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_off0000be34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE34	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d646.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD646	17380 bytes
SHA-256: `ece8d648b9e2c856e11351b11f352f10a99f0d0871b64de600b599e38cf222a3`
`font_02_sfnt_off00010319.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10319	10976 bytes
SHA-256: `26adb7e31823da7c60dd10aaf311098192445b53d9743880dc59a68012d3ddb6`

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