PDF malware analysis — malicious · 63699d7ff41d6ac2

MALICIOUS

PDF

77.7 KB Created: 2021-09-10 10:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 956d44774ac17410ad5dd1a2bd2206c7 SHA-1: 17316f23b1c2984ff73c400a135583f0075681a5 SHA-256: 63699d7ff41d6ac249fa183ba09255cff9e53d6d89b5581051789bb3c7d5ef43

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to various domains, some of which are hosted on compromised CMS uploads or appear to be disposable. The primary purpose seems to be directing users to external, potentially malicious sites, consistent with phishing or malware distribution tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.7562

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 http://schokozentrale.de/idata/jedoberavifol.pdf In PDF document text
- https://candica.pl/ckfinder/userfiles/files/11324152141.pdfIn PDF document text
- https://makenie.com/upload/files/diweza.pdfIn PDF document text
- http://simsvizag.com/admin/uploadedfiles/file///zanovaxe.pdfIn PDF document text
- https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161394895f15e5---regizexujekefo.pdfIn PDF document text
- https://vmwarts.com/ecovic/file/17380136859.pdfIn PDF document text
- http://boracayg.com/FileData/ckfinder/files/20210901_BC8A99550080619A.pdfIn PDF document text
- https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/sjj8oslu5he7013i8n2b9p3pn9/47522861234.pdfIn PDF document text
- http://flomojapan.com/upload/files/gamukukikem.pdfIn PDF document text
- https://bangvetthuong.com/luutru/files/96979934.pdfIn PDF document text
- http://ytovietnam.net/ckfinder/userfiles/files/jexatobedoxejikuj.pdfIn PDF document text
- https://eventaipei.com/upload/files/sigevasumidoxudi.pdfIn PDF document text
- http://szjwwj.com/userfiles/file///6085486311.pdfIn PDF document text
- http://myucmas.com/userfiles/file/42543108780.pdfIn PDF document text
- http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613693f1735bc---pivudowonok.pdfIn PDF document text
- http://hydrogears.com/survey/userfiles/files/nikexoja.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377dd0ac653---4323748183.pdfIn PDF document text
- https://lwim-ouargla.dz/ar/files/83141529970.pdfIn PDF document text
- http://imosa.asia/uploads/files/202109020554358245.pdfIn PDF document text
- http://trungnguyenjsc.vn/uploads/image/files/96809384441.pdfIn PDF document text
- https://webmedcentralplus.com/userfiles/file/golebodigoweti.pdfIn PDF document text
- https://fenixfalt.com/userfiles/file/faxezidoluxatirixezejebat.pdfIn PDF document text
- http://asztalosweb.hu/userfiles/file/7584907103.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=unity+android+development+tutorialPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f93f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF93F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011156.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11156	10672 bytes
SHA-256: `3eac26a620274b11afad062d9c33a2718a2c7f8025238eb8ba20a36f29be67fd`

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