PDF malware analysis — malicious · e22561e019e8ee70

MALICIOUS

PDF

79.5 KB Created: 2021-09-06 01:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 10af8512a48dba5fbad13cf30939a3da SHA-1: 1eea28b9ac5e92f0ac65f608d5f89f79b674fab3 SHA-256: e22561e019e8ee70804dae1f6bb6287b35be932d0c9f9275172d38893685d20f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The ClamAV detection further confirms its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://wastran.ru/uplcv?utm_term=guitar+chords+easy+songs+pdf PDF link annotation
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082a2ef9edc2---rulomagaborosufomosa.pdfIn PDF document text
- http://altelaw.com/uploads/image/file/39917012921.pdfIn PDF document text
- http://camdohungdung.com/upload/files/deninonanekilununepawaz.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905eb014f15---87132004369.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a0a2c32e8b6ae52f0fb3535b5be27e7/56000905790.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e7962a9cc---jotapelami.pdfIn PDF document text
- http://alexlunacoach.com/img/editor/file/jegelanilowasovewaju.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/aad443d9b677a58d8c7bf76a70c29d61/nejuj.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160860996a0182---kokomogasesamuzuw.pdfIn PDF document text
- http://cpspcb.com/uploads/files/puwevatimeji.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160739a9acae73---98265523205.pdfIn PDF document text
- https://amgaa.org/temp/files/guluji.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607217013aff2---darinenibebogubotagebiraf.pdfIn PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8e6d9f19e---62086382416.pdfIn PDF document text
- http://saltokisport.com/uploads/files/pinifapifu.pdfIn PDF document text
- http://sieuthivatlieuhoanthien.com/upload/files/6610271282.pdfIn PDF document text
- https://kamedia.vn/data/file/81349736905.pdfIn PDF document text
- http://nexxosrealty.com/userfiles/files/bamivowutaxaxofo.pdfIn PDF document text
- http://hondasushi.com/uploads/files/75353566508.pdfIn PDF document text
- https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/17f1959486db60ae9a5160ddf45a656c/finitizutozotaz.pdfIn PDF document text
- http://cuatro-pr.org/sites/default/files/file/suxisukadotejidujifada.pdfIn PDF document text
- https://dailyiat.com/html_upload/file/rabetugezezumifa.pdfIn PDF document text
- https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/31654720426c7867dbbbac602f1d1df5/wagesokakejovata.pdfIn PDF document text
- http://stellarp.com/userfiles/file/xamadevisasora.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_off0000d2de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD2DE	11104 bytes
SHA-256: `b9fdeb7645c28e524ea4e40dfa062f4f8b1d0e2c66dd7b77937514b773f341c9`
`font_01_sfnt_off0000ec9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC9C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000104ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104AE	17028 bytes
SHA-256: `c344791c4d1a94e532756f2f6a642f057a6542191f5822b2c80dfd53e33121b7`

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