PDF malware analysis — malicious · c59ed9e78d6ad245

MALICIOUS

PDF

115.8 KB Created: 2021-06-17 18:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: fd493aee1edfe98b98a88a176ee48204 SHA-1: 885bc53b0e59086f16e0d851442a265c63dce932 SHA-256: c59ed9e78d6ad245734c33f13a58ace9ffc07ddd1d658a96b08442ee97eaf0fa

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to compromised WordPress upload storage, suggesting an attempt to host malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the nature of the heuristics point towards a phishing lure disguised as a download link.

Machine Learning

Nyx PDF Classifier malicious score 0.9188

Heuristics 5

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
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://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722b039a302---xuwexibarewatizilir.pdf In PDF document text
- http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/tujev.pdfIn PDF document text
- https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d95e22118---18859014517.pdfIn PDF document text
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a6e45013a---73073667636.pdfIn PDF document text
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160805ff0ecf44---20517177070.pdfIn PDF document text
- http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9b2cd6127---55105696294.pdfIn PDF document text
- http://unnatiwelfareorganization.com/ckfinder/userfiles/files/5810056113.pdfIn PDF document text
- http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094de1524f8d---75338562153.pdfIn PDF document text
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/lq1q0oga93qi29eakg1kgpno7q/79659449734.pdfIn PDF document text
- http://daugiavanthienphuoc.com/media/ftp/file/14515348232.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/696b5b91b122692713de66aeb74a299d/wijutonixomesuwid.pdfIn PDF document text
- https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/17a43cdf907ed0a32b1ffe5626102b67/gizifaxedunalonaleluzis.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16095b9e2afc8e---xibemukatubupazefofome.pdfIn PDF document text
- http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d0d00aa75---58931799065.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16094b405e729f---38877065712.pdfIn PDF document text
- https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/9ktpitpnkrpj5dj2q2mfmvqggj/96042924315.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=dura+daddy+yankee+song+downloadPDF link annotation
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dbef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBEF	6744 bytes
SHA-256: `b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808`
`font_01_sfnt_off0000eca4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECA4	58040 bytes
SHA-256: `cd6b898f06a538b404052dbba208165384982b430d9893a7c69ad27b1b4aa0db`
`font_02_sfnt_off00019d5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19D5F	5248 bytes
SHA-256: `5547eccaf446a4eda99d839762d2c86455edef56cc2fbafc6a17234bce1da180`
`font_03_sfnt_off0001af69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AF69	11052 bytes
SHA-256: `efd9c003bcf1924e9d8a89cb4e28e421c1bfff41d68aa0afbd015200dda614ba`

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