PDF malware analysis — malicious · e298dac708a4ad11

MALICIOUS

PDF

70.3 KB Created: 2021-09-03 00:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 0c6f66b6010e0686e7aab5b2e28aaf98 SHA-1: 70db7526e5a03ebb946f75ec31b07ff9c161de2f SHA-256: e298dac708a4ad114b10bd51f9025362feba4196a6b550e7ce43c52bed646b71

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs hosted on potentially compromised websites, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The file's structure and embedded URLs suggest it is designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier suspicious score 0.4539

Heuristics 5

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
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://agataklimowska.pl/userfiles/file/ruxupowilimo.pdf In PDF document text
- https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/7b3e122a569a3d907f925b8ea22fe6fa/92860800634.pdfIn PDF document text
- https://on-call-anatomist.org/ckfinder/userfiles/files/87769797633.pdfIn PDF document text
- http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989a9caa15f---76515983782.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae469835109---66862299843.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/21d232be15c1c2768f8c8a3495187cc4/14388231987.pdfIn PDF document text
- http://teusz.pl/UserFiles/file/75279603226.pdfIn PDF document text
- https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/h2h4g9afsett9urhsobu418cic/desezurukuzubukigufogin.pdfIn PDF document text
- https://seerupit.dk/assens/file/patavuzakonu.pdfIn PDF document text
- https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af760780c57---vavodozunul.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d6450bb62---76452105991.pdfIn PDF document text
- http://anhuizpyy.com/upload_fck/file/2021-5-5/20210505161551814974.pdfIn PDF document text
- https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/8536cb21ad98a4ed72dec38cff35e0f9/94986179596.pdfIn PDF document text
- https://history.tlshaa.org.tw/ckfinder/userfiles/files/89012969825.pdfIn PDF document text
- https://j-kowalewski.pl/uploads/userfiles/files/panufunewaniged.pdfIn PDF document text
- https://regaluxiluminacion.com/uploads/assets/file/29156726812.pdfIn PDF document text
- http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa91993db9b---zajipoxelagamarenuka.pdfIn PDF document text
- http://westernmaki.com/uploads/files/rebovasu.pdfIn PDF document text
- http://lifeline-sports.com/files/file/11546470561.pdfIn PDF document text
- https://markapin.com/calisma2/files/uploads/muzumawifem.pdfIn PDF document text
- https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/07d150fa27d9aa69caa66ce8da6a628a/kamupunef.pdfIn PDF document text
- http://arslanemlak.come/file/2528000911.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce81ec9f67---73978143022.pdfIn PDF document text
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/m7gdceq76hfnrk330h0qtnl3g2/waxewetinuzonozonid.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=dresser+un+chien+de+garde+pdfPDF 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_off0000e084.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE084	10736 bytes
SHA-256: `8253f837536ff1d286405f5b63cbd45cc352583bd138208c32e7a43a87f91944`
`font_01_sfnt_off0000f8e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8E3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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