PDF malware analysis — malicious · 4ce1c279630d1977

MALICIOUS

PDF

86.6 KB Created: 2021-08-26 04:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 0b2df29bbd011d4aa49b38878d79797c SHA-1: c47aab3600cb2a5efe94fe03e15fcc22ed279026 SHA-256: 4ce1c279630d1977cfb3c78aec573dc456f4f3464243673c50c6f35985daf90f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs are consistent with attempts to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

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 http://angarakshaksecurity.com/userfiles/file/68772384812.pdf In PDF document text
- http://hrdiborice.cz/erucom1/files/files/82110795088.pdfIn PDF document text
- http://aven.su/userfiles/file/monimizisopetiwuji.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7tqt7glbnnidli6toc0338daro/fefet.pdfIn PDF document text
- https://andhimazhai.com/images/files/5851705676.pdfIn PDF document text
- http://bigpictureresources.com/userfilesbigpicture/file/galivazupujumanuxojo.pdfIn PDF document text
- https://alshamiltrading.com/alshamilfiles/file/58132488488.pdfIn PDF document text
- https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/0f5be10a954bdc94bb45b3ce45ab1e48/tijesoxalosuvafefofa.pdfIn PDF document text
- http://utuin.net/files/fckeditor/file/kebox.pdfIn PDF document text
- https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/o1eej5kn868c2n4et677dkh56s/3415029965.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1943bd844e---ramufevo.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094a48f7b377---18609972281.pdfIn PDF document text
- http://briarcliff68.com/clients/71184/File/11086836804.pdfIn PDF document text
- http://baovephuongtroi.com/vietkiendo/upload/file/40766403820.pdfIn PDF document text
- https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/jel9g0gb6ffmfn2pu5nmmq8kfk/44677489893.pdfIn PDF document text
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a1f751708---48338128300.pdfIn PDF document text
- http://logisticsnetworks.net/ckfinder/userfiles/files/88914161639.pdfIn PDF document text
- http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/0b709bd18ce8706d08ee714c2fd0834a/6339322744.pdfIn PDF document text
- http://autoscuolauniversale.it/userfiles/files/bavova.pdfIn PDF document text
- https://mygoaltv.org/ipp/images/uploads/files/70369685200.pdfIn PDF document text
- https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/lusogipefuze.pdfIn PDF document text
- https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/127d51ip03pf8h4s6jc45n2gsi/67584332847.pdfIn PDF document text
- https://jyapa.com/jhuoyue/uploadfiles/67258825162.pdfIn PDF document text
- https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/b39ca7a21f8b24a85cc4914999c75544/badakegiropuvegojaku.pdfIn PDF document text
- http://slsnn.ru/content/file/15577151394.pdfIn PDF document text
- https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b1a2fc63b8625e18400d6a9fc2bb8023/27042157512.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=round+in+boxingPDF 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_off0000ef03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF03	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010715.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10715	17396 bytes
SHA-256: `3e8d1c6bb761407305263cd4acede3fba4e42ea6bb8b24d7bdb04156720f31f3`
`font_02_sfnt_off000134a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134A5	10104 bytes
SHA-256: `78206ad59eaf74fd93a66558de83fa1abad1e048c1f3107a2b0af962493a2f92`

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