PDF malware analysis — malicious · cc48c9d25ee0e39a

MALICIOUS

PDF

77.6 KB Created: 2021-09-15 09:34:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 9f391271de8e4819250dcc0d22a222a4 SHA-1: 045a03379ac431e6f6fc14e73fb0fe424f25fa63 SHA-256: cc48c9d25ee0e39acc6734acd588e05ffa5ba6095a25a5dec90729908c4c4f77

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs further supports the attack pattern of directing users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9943

Heuristics 5

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.
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=principles+of+mathematical+analysis+3rd+edition+solutions PDF link annotation
- http://associatedreclaimed.com/userfiles/files/72064989259.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/161418584e0f05---24592840748.pdfIn PDF document text
- https://dreamscapes.ca/dream_scapes/userfiles/files/92334568151.pdfIn PDF document text
- http://anadolumatbaa42.com/genelresimler/file/xuxonajexinido.pdfIn PDF document text
- http://gevenschoenen.nl/ckfinder/userfiles/files/20653715121.pdfIn PDF document text
- https://igk-lilienthal.de/downloads/fivosaluroxi.pdfIn PDF document text
- http://vietcem.vn/public/default/ckeditor/files/35761948197.pdfIn PDF document text
- http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed7b2ab768---dotalonituwod.pdfIn PDF document text
- https://hlj-vibration.com/uploads/image/20210910/files/20210910230130.pdfIn PDF document text
- http://xszhuhai.com/uploadfiles/files/11915505781.pdfIn PDF document text
- http://naitikfashions.com/ckfinder/userfiles/files/39932062383.pdfIn PDF document text
- https://gkscam.com/userfiles/file/funasunodefijezuxeguliton.pdfIn PDF document text
- http://foxgraphics.paulsfashion.in/files/tuvuv.pdfIn PDF document text
- http://litho-and-co.fr/ckeditor/upload/files/14856579420.pdfIn PDF document text
- http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/toxejurasegatesatu.pdfIn PDF document text
- http://arsvet.ru/img/upload/gobevivomejavefodev.pdfIn PDF document text
- http://partnercable.com/files/73126030213.pdfIn PDF document text
- http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/60262060745.pdfIn PDF document text
- http://clinical-pain.com/pds/userfiles/files/taxizaguwidawezuma.pdfIn PDF document text
- http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/kujabevo.pdfIn PDF document text
- http://bibliotekaszamocin.pl/img/upload/files/36051766657.pdfIn PDF document text
- http://pes.edu.mn/ckfinder/userfiles/files/jevamejeva.pdfIn PDF document text
- http://home-plast.ru/foto/files/nitizaxi.pdfIn PDF document text
- https://rajakeempat.com/contents/files/bajuwegiw.pdfIn PDF document text
- http://safarang.com/basefile/files/koketamijarobexejipaxadu.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_off0000c2cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC2CB	19584 bytes
SHA-256: `54844e5976ab2f6e5b15eefa51dfd1458ae8f7da8d785eadcdf4f7bb2ca769e1`
`font_01_sfnt_off0000f611.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF611	11272 bytes
SHA-256: `9a21ec95aec6e37840b23797a7ace9a7a35fe66b5cf51e75c5ceb064f9d86f97`
`font_02_sfnt_off0001105b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1105B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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