PDF malware analysis — malicious · 1bfb8782307d6e4c

MALICIOUS

PDF

73.5 KB Created: 2021-09-06 12:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: d4e0fd43a36830ff9a23d0b3ca266b88 SHA-1: 5629085fcb69467b8326ffe212c056b6e986c31d SHA-256: 1bfb8782307d6e4c2f9f54ec7b0bc3faa090f7d685f85afe01551536b1a0ce92

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a phishing or malicious redirection campaign, as indicated by multiple heuristics flagging it as a link farm pointing to compromised CMS uploads and disposable hosting. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, likely intended to lead users to malicious content or further stages of an attack. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.8616

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://ahlhy.com/uploads/file/27172117284.pdf In PDF document text
- http://ildongwire.com/userfiles/file/kufajefifegonuzagunab.pdfIn PDF document text
- https://ivanda-commerce.hr/userfiles/file/842330742.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/73725764330.pdfIn PDF document text
- http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/8cgaptdeakru8158fsgktr2ko0/voxigurowiwolitigin.pdfIn PDF document text
- http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f9847bdb7---83305017273.pdfIn PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0aab1f2d3---kadawagaxuzutataf.pdfIn PDF document text
- http://wohingltd.com/userfiles/73192182996.pdfIn PDF document text
- http://langmypham.com/luutru/files/geriseneraxuxixo.pdfIn PDF document text
- https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/28245cd11a5a1aa20bda3ea97fafc2b3/40306524912.pdfIn PDF document text
- https://xaydungdonggia.com/app/webroot/files/images/pages/files/8697351751.pdfIn PDF document text
- https://bczenekar.hu/files/file/titegubozovarokab.pdfIn PDF document text
- http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/38261521794.pdfIn PDF document text
- https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/fb2194c566aa7ba89505e18d04b4ebbc/fevazokimezubisizogok.pdfIn PDF document text
- https://wolfgang-photography.com/userfiles/files/kafukatufazalesij.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f225ccff26---dizowotagewagoxajo.pdfIn PDF document text
- http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f20f8e992---96994273530.pdfIn PDF document text
- https://perfecthospitals.com/ckfinder/userfiles/files/91981535310.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac112e8c4c9---65487553572.pdfIn PDF document text
- http://www.chatanakonci.cz/userfiles/file/tejusixixo.pdfIn PDF document text
- http://casaatlantida.com/userfiles/file///6007679833.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/ad0214c2653cd53ec507fb443a83ba40/97254700186.pdfIn PDF document text
- http://kingsfci.com/userfiles/file/69573526365.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=bianchi+musculoskeletal+ultrasound+pdfPDF 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_off0000cd68.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD68	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e57f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE57F	11132 bytes
SHA-256: `0a1213afbd439b202d0535dde40b512cc2915fa66d26300a45d5df29b70adb57`
`font_02_sfnt_off0000ff45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF45	17952 bytes
SHA-256: `b62c1be53703b173eda4a07be228649df9c05ed94a5e75cf1ef3648b7187d243`

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