PDF malware analysis — malicious · 26d47955a2b269fa

MALICIOUS

PDF

73.7 KB Created: 2021-09-13 14:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 8365b3ea8ddc06ea3a12f75504b5f2ee SHA-1: caa39d10334fe6b6ab9ffe9f304e7ce73eeaf16c SHA-256: 26d47955a2b269fab6a89bd284233851e9e81e6ed4a9a2c9e9438cfd4f4e3f5f

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to potentially compromised WordPress upload directories or disposable hosting, suggesting a link farm used for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document designed to trick users into navigating to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://villatoscana-pi.it/userfiles/file/bexajoradunajigosofamo.pdf In PDF document text
- https://noddy.nu/images/file/21801809184.pdfIn PDF document text
- http://haitrungkim.vn/uploads/userfiles/file/gifezonikalupopulonemaru.pdfIn PDF document text
- http://sofar-france.com/userfiles/file/28824876822.pdfIn PDF document text
- https://afritransport.com/app/webroot/files/file/zarofovolixagirenu.pdfIn PDF document text
- https://drakbera.com/ckeditor/ckfinder/userfiles/files/32919788830.pdfIn PDF document text
- http://agrocare.hu/ckfinder/userfiles/files/rukopesonakozagu.pdfIn PDF document text
- http://purofirstli.net/userfiles/file/30041536911.pdfIn PDF document text
- http://bibliotekaludwin.pl/img/upload/files/sivatixuborodosex.pdfIn PDF document text
- http://putzlappenborner.at/editor_up/lilazidivadomageben.pdfIn PDF document text
- http://uptownherndon.com/uploads/files/62657295396.pdfIn PDF document text
- http://thessalonikiflights.com/files/files/diwosoravopi.pdfIn PDF document text
- http://pjzhengwang.com/upload/file/20210913_140414_177.pdfIn PDF document text
- https://tavcam.com/upload/ckfinder/files/romukefemagu.pdfIn PDF document text
- http://premiercontractinginc.com/files/file/xovebepigopolavixug.pdfIn PDF document text
- http://kasand.com/userfiles/2733661035.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613230b5e6b4c---virozigoxokis.pdfIn PDF document text
- http://zhongjiukeji.com/upload_fck/file/2021-9-4/20210904061513787264.pdfIn PDF document text
- https://doellefjelde-mussemarked.dk/images/newsmail/file/jugipiwaxumanibugumez.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/07bd58d0d2f175498069bc99920cf08a/vodegas.pdfIn PDF document text
- http://htygroup.com/upload/files/maxowupuvaxewibigobogimex.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/bb97cbe29db579c4900eab3a7c54baa0/gozurisagenar.pdfIn PDF document text
- http://nazycakes.com/userfiles/file/tutobagudiwefoz.pdfIn PDF document text
- https://etest.vn/app/webroot/uploads/files/55746896988.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=boss+movie+online+watch+akshay+kumarPDF 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_off0000bc7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC7F	11008 bytes
SHA-256: `ab41842d6a92cc5eb0df16df8d4adaf635dc25f74e81bd5b82a8ea6b848d22bf`
`font_01_sfnt_off0000d602.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD602	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ee14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE14	16688 bytes
SHA-256: `6773999a4a5b10ce9c0f3bf6bcfbc41457516b07a8511e1c7e687a4939bf9e34`

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