PDF malware analysis — malicious · e56aa3f0246ba512

MALICIOUS

PDF

85.2 KB Created: 2021-09-21 18:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: f551670026f4d1e2a66cd71e622f6faa SHA-1: 033791aed4dafadbfb12d34335fd0fff502598b9 SHA-256: e56aa3f0246ba51294ac8adecc976323b7575825f1b862e32939645765a32588

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://crewmak.ru/uplcv?utm_term=how+reformat+android+phone PDF link annotation
- https://cancelaria.pl/galeria/file/wonaxopix.pdfIn PDF document text
- https://sunsoftinfoway.net/ckfinder/userfiles/files/binatekawudi.pdfIn PDF document text
- http://msslink.ru/userfiles/files/vukojojovomemekegomam.pdfIn PDF document text
- http://hkxhjfc.ltd/uploads/files/20210904163000.pdfIn PDF document text
- https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/f5a56e586a5997b93e9938c6dfea5256/bazurozedugoliru.pdfIn PDF document text
- https://mangallagn.com/images/file/81910091491.pdfIn PDF document text
- https://protectname.xyz/whoisprivacy/userfiles/files/74837423471.pdfIn PDF document text
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fddb151dc6---49113470685.pdfIn PDF document text
- https://groupunsur3.com/contents/files/berunodemiwemakuzipe.pdfIn PDF document text
- https://hexema.com/FCKeditor/file/jisaguv.pdfIn PDF document text
- http://aj-freight.com/ckfinder/userfiles/files/39680306584.pdfIn PDF document text
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16145622e4e180---xanojojulusumepipimoveb.pdfIn PDF document text
- http://bftt.marketsearching.com/upload/files/92891800981.pdfIn PDF document text
- https://propertiproperty.com/Uploads/userfiles/files/nopadigafogutak.pdfIn PDF document text
- https://fnb-concepts.com/images/uploads/files/60017170357.pdfIn PDF document text
- http://domplus.su/userfiles/files/funuvibolofefifo.pdfIn PDF document text
- http://dailycan.com/userfiles/files/vusef.pdfIn PDF document text
- https://livnica-metalurg.com/images/pages/file/kuresum.pdfIn PDF document text
- https://mobile-translator.eu/app/webroot/media/files/99763168501.pdfIn PDF document text
- http://denprokhorov.ru/images/file/tijapupin.pdfIn PDF document text
- http://mynigaoe.com/upload/file/20210909110213.pdfIn PDF document text
- https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c55b4d82a---lesuvetukupodubufu.pdfIn PDF document text
- https://digbijoynath.in/uploads/userfiles/files/daxekajexaxofozojugo.pdfIn PDF document text
- http://jplus-ag.com/upload/files/BodyFile__613A849BAF334.pdfIn PDF document text
- http://deleersnijder-bocaege.be/images/file/lokopeluwuxo.pdfIn PDF document text
- http://amirafouad.com/uploaded_files/file/dikuxexuvububo.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_off0000e8e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8E7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000100f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100F9	17656 bytes
SHA-256: `ecc56612e3b41ed82761de3c73f64215f66817b5ac0a2abb65be3b9d058f2ad1`
`font_02_sfnt_off00012f32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F32	10628 bytes
SHA-256: `eca39c0abbe5de5bd578d7a3ed68e3ab43cb3e3782c2c3be5fe823bf9e8efdc9`

Open this report in the interactive analyzer, or submit your own file for analysis.