PDF malware analysis — malicious · dc8751d7a47c72fa

MALICIOUS

PDF

70.5 KB Created: 2021-09-29 10:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: d61b2b3bd80c5460302c06672070fc5e SHA-1: 8893a3238cdfcadf0e301cce94f16c153dc35c33 SHA-256: dc8751d7a47c72fa43c4b8c9bca57a27d75cbeb60afabad7b886bd43152bb0eb

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

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://eravukappalpalli.com/userfiles/file/rimatejilatalawifozejokev.pdf In PDF document text
- http://byecook.com/ckupload/files/dimosiku.pdfIn PDF document text
- http://jandenzobv.com/image_uploads/file/zebojezigepunizabugonus.pdfIn PDF document text
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16139eff924f13---55497846982.pdfIn PDF document text
- http://naturalmis.com/userfiles/file/99482407057.pdfIn PDF document text
- http://mosme.org/uploadfile/files/48171318842.pdfIn PDF document text
- https://majorsagilekvaros.hu/uploads/file/64136036620.pdfIn PDF document text
- http://sensi-leszno.pl/userfiles/file/zagapufo.pdfIn PDF document text
- https://silverbirdmarketing.com/pages/images/file/ligobegu.pdfIn PDF document text
- https://wcfkenzi.com/ckfinder/userfiles/files/kulobiweregoxekefar.pdfIn PDF document text
- http://hankyunget.net/userData/board/file/47178472606.pdfIn PDF document text
- https://guclupin.com/calisma2/files/uploads/4638031641.pdfIn PDF document text
- http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/94831473518.pdfIn PDF document text
- https://www.comperat-89.fr/ckfinder/userfiles/files/tuvutifesetagezotanakilod.pdfIn PDF document text
- https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/6182174065.pdfIn PDF document text
- http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sigiwixewowenofe.pdfIn PDF document text
- https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/tapekex.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132769f8c67e---58244551149.pdfIn PDF document text
- https://www.lire-les-notes.com/ckfinder/userfiles/files/35945469778.pdfIn PDF document text
- http://mextro.de/upload/files/31645272700.pdfIn PDF document text
- https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/bipukopakixizisulipija.pdfIn PDF document text
- http://matsonconstruction.net/userfiles/file/93642280525.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+jungle+sinclair+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_off0000b1e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1E1	16424 bytes
SHA-256: `55b434dde2753c277d93abb7a0b3a1b8c6995d844a2df4977486a44326bd9158`
`font_01_sfnt_off0000dbdc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBDC	10876 bytes
SHA-256: `ab662c0d7ba3397ed8c774099aecc51ede870257c297ead69b33fb91e260e4a4`
`font_02_sfnt_off0000f4a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4A0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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