PDF malware analysis — malicious · 5ea5003130aa884c

MALICIOUS

PDF

84.4 KB Created: 2021-09-04 20:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 81590e26d5cff2c2428ff5b46a651541 SHA-1: a4b8b37bd3db1af8bad83984963a42c77db10b1e SHA-256: 5ea5003130aa884cd46b4fad4e6bdee81c748d275d7805a8767364b9a8263f63

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9780

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 http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f86181bb21---21807766538.pdf In PDF document text
- http://herium.net/FileData/ckfinder/files/20210708_6CB5406B52BAB7BD.pdfIn PDF document text
- http://ural-resyrs.ru/data/file/27924228600.pdfIn PDF document text
- http://sunarfactory.com/userfiles/files/11374918503.pdfIn PDF document text
- http://www.offshoreyachts.net/web_upload/editor/files/vivutaloropotava.pdfIn PDF document text
- http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/njt3bbrr52oh947b5apnntnvio/milepegi.pdfIn PDF document text
- http://xn--k1akb4c.xn--p1ai/userfiles/file/dedegukob.pdfIn PDF document text
- http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087008989cbf---tavetemikenikebuwozit.pdfIn PDF document text
- http://alkanboya.com/files/file///96924933098.pdfIn PDF document text
- https://rireenfrance.com/images/upload/files/88826969635.pdfIn PDF document text
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/e1dedd493b824c4594949b99c7efe1d7/bimosi.pdfIn PDF document text
- https://ipssecurityconsultants.com/ckfinder/userfiles/files/jorokotakupilo.pdfIn PDF document text
- https://eitmedu.in/ckfinder/userfiles/files/94601789516.pdfIn PDF document text
- http://esistore.de/userfiles/file/7792525201.pdfIn PDF document text
- http://chronocertif.com/userfiles/file/98561946327.pdfIn PDF document text
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1090d8625---viwavaxovavesadozi.pdfIn PDF document text
- https://frontivo.ro/userfiles/file/tikefizofegawibozotovuf.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c22429c38a0c90177fd4e03714f4cca5/96804775550.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf579755291---11649966488.pdfIn PDF document text
- https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/6c8524548b31444fcd6a124afb28befb/rugug.pdfIn PDF document text
- https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad26fd2f4d---fetemado.pdfIn PDF document text
- http://apexnepaltravel.com/userfiles/file/temome.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a23677fa8---39454755096.pdfIn PDF document text
- http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/42744478629.pdfIn PDF document text
- http://altinellerinsaat.net/UserFiles/file/99869526217.pdfIn PDF document text
- http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/a74b8a7075e8199028f3c5b2c91f6b9d/pupen.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bugler%27s+holiday+trumpet+pdfPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c022.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC022	11144 bytes
SHA-256: `e1709667730bcd4553e0ac9adff96af229296311f50042585feae1e879bd5bce`
`font_01_sfnt_off0000da06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA06	16300 bytes
SHA-256: `1e611ebb7e8f15bb82fb075771a68760b0d31941c775052c16c6ad5590192c66`
`font_02_sfnt_off0000f049.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF049	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001085b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1085B	23552 bytes
SHA-256: `d737fdff609761f364d7e9f412ec148608b3cefc75880d7f63ad451ffcaa3bec`

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