PDF malware analysis — malicious · 1bf03fdad3376b1d

MALICIOUS

PDF

81.0 KB Created: 2021-09-09 07:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 0ad1916ec0f99cf7bf37d732d3bdd6af SHA-1: 46865c48f3e08c46ad494d8f1198f2bbb81a8ec1 SHA-256: 1bf03fdad3376b1d43f7baec54d77e8b91ceb991ea8971a4e72bade3a6d6e0e3

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the presence of multiple links to disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://sfipl.in/userfiles/file/virebisujuzomegizuzagexe.pdf In PDF document text
- https://www.idd.no/ckfinder/userfiles/files/66752604309.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16136f4f73c496---sobesige.pdfIn PDF document text
- http://pnmanagementsolutions.in/uploads/wimukakimujelok.pdfIn PDF document text
- http://ahkkpcm.org/userfiles/44946676724.pdfIn PDF document text
- http://www.rannatennis.ee/data/upfiles/files/80814413829.pdfIn PDF document text
- http://jamesandsons.ca/userfiles/file/41944013870.pdfIn PDF document text
- https://zlataraburmevuckovic.com/files/17747295848.pdfIn PDF document text
- https://cepatdaftargroup2.com/contents/files/83205554726.pdfIn PDF document text
- http://kapsalonindex.nl/images/uploads/bawekiwamewilu.pdfIn PDF document text
- http://exclusivelimoservice.com/ckfinder/userfiles/files/84930187271.pdfIn PDF document text
- http://khocabien.com/uploads/files/57556741818.pdfIn PDF document text
- https://auto826.vnpec.xyz/uploads/files/zajeribavalilorerotema.pdfIn PDF document text
- http://maivietnamesecotati.com/uploads/files/witunoroxiwudi.pdfIn PDF document text
- http://huspanda.com/data/ckfinder/files/95677671609.pdfIn PDF document text
- https://marlin-aquarium.ru/ckfinder/userfiles/files/pofofatigululo.pdfIn PDF document text
- http://alpinist.store/sribati/editor/uploadfiles/vewal.pdfIn PDF document text
- https://taperagi.com/contents/files/makarigowodafamolefewezon.pdfIn PDF document text
- http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/50424883842.pdfIn PDF document text
- http://www.companyforte.com/imagenes/editor/file/tuganikijoruzuki.pdfIn PDF document text
- http://bakersfield.thepokeluau.com/uploads/files/rinatonifawomabaweb.pdfIn PDF document text
- http://retrolondontees.com/userfiles/file/javewosinojewanogo.pdfIn PDF document text
- http://park-seversk.ru/other/js/ckfinder/userfiles/files/89462024908.pdfIn PDF document text
- http://motorlustor.net/userfiles/file/98942139977.pdfIn PDF document text
- http://autoachtercamper.nl/userfiles/file/73029173924.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=sao+alicization+rising+steel+charactersPDF 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_off0000cebd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEBD	21752 bytes
SHA-256: `02313fc414784380cf2e54c7c3eadbcb7a7d15dbf313f4a5b83a85aa43bd6927`
`font_01_sfnt_off000105e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105E3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011dfa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DFA	10644 bytes
SHA-256: `5c5b33aab71aaf68180e2ceb0efbc72ec90bc6fc1d45a6f3792217d7f26dd465`

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