PDF malware analysis — malicious · 25b77e44120eb42b

MALICIOUS

PDF

88.1 KB Created: 2021-09-07 13:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 0df495607e558a8902a801ca8ef15019 SHA-1: dd714a2b8cf02537496ada423d5147ffbc81b055 SHA-256: 25b77e44120eb42b798cac8d0ea5596d7f6c46f0afba9aeee6ebcaeb08e795b0

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing lure. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links are indicative of a spearphishing attachment, likely designed to lead victims to sites hosting further malicious payloads or phishing forms.

Machine Learning

Nyx PDF Classifier clean score 0.2133

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://garglob.ru/uplcv?utm_term=business+letter+of+recommendation+pdf PDF link annotation
- http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c19ad085d---93680967600.pdfIn PDF document text
- http://fishtech.org/uploads/userfiles/file/file/wegikulekepe.pdfIn PDF document text
- http://billedbutikken.dk/articlefiles/file/renif.pdfIn PDF document text
- https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/fisixezipesiw.pdfIn PDF document text
- http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/xigijoluwigut.pdfIn PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/7063f4c2629bef2888be14c22b882e1c/losupatipojekepuxezozesaz.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111bf9b83bc3---kaguletonilodaloburolo.pdfIn PDF document text
- https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/173a6295b7e1deaac69fc8a35ebfdc3b/nudapixexupopeno.pdfIn PDF document text
- http://dolphinegypt.net/userfiles/file/25464488405.pdfIn PDF document text
- http://veterinariacasettamattei.it/userfiles/files/rekokawesepiliruv.pdfIn PDF document text
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/93c60bb0d8fd6f2c73c98e5a6b988404/rolapel.pdfIn PDF document text
- https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/qkttq15ae0ti84lota2er4d3kp/88535018493.pdfIn PDF document text
- http://dissanna.com/temp/fckeditor/file/38742537246.pdfIn PDF document text
- http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609797f06d1a5---92441720083.pdfIn PDF document text
- http://parbatsamajjapan.com/img/files/files/sapekefusagefif.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/dq6qo6vc6nbdhtnkkju0qnhii7/vijomatamukaginusik.pdfIn PDF document text
- https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/b0voua2r8cu4kbqqn7n2q977qf/20121765543.pdfIn PDF document text
- http://www.allatpatikapecs.hu/images/file/88521411125.pdfIn PDF document text
- https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/61a087a89aac5fa877497d4bf2a71e8e/14316255559.pdfIn PDF document text
- http://doingthing.com/downloads/blog/geust/files/xuvavimevugus.pdfIn PDF document text
- https://colegiumaniucarei.ro/ckfinder/userfiles/files/fugusugine.pdfIn PDF document text
- https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/2a031a862e0c8e4337d6c7d7de4e1e94/14694305904.pdfIn PDF document text
- https://audreyheselmans.com/_files/file/79187744737.pdfIn PDF document text
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb621c048f---4483392173.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/78cee653ecf0a7c2f85d146e13932a91/66795046147.pdfIn 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_off0000f63c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF63C	20972 bytes
SHA-256: `4614ec03cbcdf99063cac9462f93f36b94db27d90835d2d01a9c4a132daa6dd3`
`font_01_sfnt_off00012bda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BDA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000143f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143F1	10936 bytes
SHA-256: `4184d384efeeb16639cb266373f663b454517a8063c9431e792f4b9f1ae50515`

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