PDF malware analysis — malicious · 59b14f182665009d

MALICIOUS

PDF

85.9 KB Created: 2021-07-07 14:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 51c7e086649a66ef27e45922cc00b90b SHA-1: 0d96ebb385c0527864d56dbebd6b32fa9a7a754d SHA-256: 59b14f182665009d12b1eef496ae74a96b064decf71d2ba3aac5e24d14a8459c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple links pointing to potentially compromised websites and disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.5879

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 http://okmarin.ru/userfiles/file/68078671446.pdf In PDF document text
- http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/pobolupabuzakutexekosole.pdfIn PDF document text
- http://anhbanglaw.com/userfiles/file/98749283141.pdfIn PDF document text
- https://aspit.ro/imagini_ws/81433260614.pdfIn PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb9af65486---lobof.pdfIn PDF document text
- http://imi.vc/upload/files/85017259260.pdfIn PDF document text
- https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/3b528bcfa4a09d3bf2dc405feb7a4dff/jukobitururagi.pdfIn PDF document text
- http://metallpress.ru/files/porozegovoxejulodivebiw.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0gsqqb5s4ekktic9ue40ctf2e2/baxel.pdfIn PDF document text
- https://crownprolaw.cn/userfiles/Proj_Name//files/35898508342.pdfIn PDF document text
- https://dietacud.eu/upload/file/37116207572.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160787f73901d5---daxavivire.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/42c705035d657c256ad118d414bf9116/nixal.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/af071cd2ef2070963e0f1286cbeab98e/42922414675.pdfIn PDF document text
- http://josephlillianmorrisfamily.com/clients/59960/File/87463378634.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079674915e94---kekegifeterav.pdfIn PDF document text
- https://mobilieroccasion.fr/uploads/file/gevezulapiwakefun.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/1601350e7b55e6f2a0f8b9fb8a1921aa/pewezopojiporisoned.pdfIn PDF document text
- https://deltarealestate-eg.com/userfiles/file/rarijexobalarunikakorawi.pdfIn PDF document text
- https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/aeabef2e675ff0445a73ad01fed450fb/wolirudalodetepenuzepelo.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=100tg+day+of+schoolPDF link annotation
- 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_off0000f72f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF72F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010f46.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F46	10516 bytes
SHA-256: `7f5f90c9f7661f37546b2ce3731821e14eed63dabd636aa8f1a3462b4367b901`
`font_02_sfnt_off00012732.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12732	17048 bytes
SHA-256: `51aa60ac65218515f19c8e6e0797e9c5b7a664cb514be0acee986b5a31d03db2`

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