PDF malware analysis — malicious · 18082fe7f3004ff5

MALICIOUS

PDF

70.2 KB Created: 2021-10-01 11:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 2568f8cb11d2344765f0328673187391 SHA-1: f771cbc367c8a66d851234123f42a5624ab280a7 SHA-256: 18082fe7f3004ff52f45cdae39133edb865491b8f02dcb6e6f52e74ebbffba67

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains numerous embedded URLs pointing to link farms hosted on disposable domains, designed to redirect users to potentially malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

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://infrive.ru/uplcv?utm_term=percy+jackson+and+the+sea+of+monsters+pdf PDF link annotation
- http://balalajka.nu/media/93687326761.pdfIn PDF document text
- https://sanmuabandoanhnghiep.org/images/content/files/segatosivawegawoguwos.pdfIn PDF document text
- http://lsbwg.com/ckfinder/userfiles/files/20210905/1222361796.pdfIn PDF document text
- http://xyr59.com/filespath/files/20210913232625.pdfIn PDF document text
- https://umiyawoodworks.com/fckdb/userfiles/file/sabopuwelesofinofa.pdfIn PDF document text
- http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/xuvatirar.pdfIn PDF document text
- https://igruppe.no/ckfinder/userfiles/files/78054967766.pdfIn PDF document text
- http://fipjp.com/userfiles/file/93933703658.pdfIn PDF document text
- https://www.blondel-bois.fr/ckfinder/userfiles/files/46781206326.pdfIn PDF document text
- https://qfuse.it/images/uploaded_files/ckfinder/files/1632191624_11dcb3f261.pdfIn PDF document text
- http://lakesnwoodskerala.com/uploads/file/jopodavirujiner.pdfIn PDF document text
- http://saiprogetti.net/userfiles/files/95999924082.pdfIn PDF document text
- http://hoya-system.com/uploads/files/202109180136008599.pdfIn PDF document text
- http://sumisaedu.com/FileData/ckfinder/files/20210924_1F0EA74C04E7CCF1.pdfIn PDF document text
- https://khyatiinfotech.biz/ckfinder/userfiles/files/vakezotadeligugotufamu.pdfIn PDF document text
- http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130431073c2e---zabuneroripegirexelusab.pdfIn PDF document text
- http://schokofontaene.de/idata/65730682061.pdfIn PDF document text
- https://ozora.schaffsen.com/contents/file/55288965618.pdfIn PDF document text
- http://uhy-th.com/image/upload/files/sufugomulemagi.pdfIn PDF document text
- https://aquamedicasatumare.ro/ckfinder/userfiles/files/92640892934.pdfIn PDF document text
- http://thepnguyentran.com/media/ftp/file/xesokavuxobifoziziw.pdfIn PDF document text
- http://fine-cottage.ru/userfiles/file/pupelokodugowexak.pdfIn PDF document text
- https://mepho.hu/ckfinder/userfiles/files/73272018837.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_off0000b1c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1C0	15480 bytes
SHA-256: `94e5b8db6010a45b42660cbaee428db9a879708e259933c0f9151c5cd6b7e559`
`font_01_sfnt_off0000d929.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD929	11084 bytes
SHA-256: `e764693a864da7c7125c575d6a357bd2703a38247a75900b08a99bc3851a10df`
`font_02_sfnt_off0000f2e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2E4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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