PDF malware analysis — malicious · 9361c4c1c74bb521

MALICIOUS

PDF

78.3 KB Created: 2021-07-26 11:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: 5b83ad13e7d426d0fbbdcb2aaf7f4423 SHA-1: 8dba19082a022c2b353b17f268e67a68e149c4cf SHA-256: 9361c4c1c74bb5219424db2afd52d2d36b6a1e4a26762b875df2afc38f24b3ff

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.6426

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 https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/cb10c91d4c4599a9112937527436adbe/10783956993.pdf In PDF document text
- https://bearings.vn/images/ckeditor/files/10198692230.pdfIn PDF document text
- http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/napugomagimorafakakipa.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/31799332223.pdfIn PDF document text
- https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/56a58c5721dba31b3b8dd89c52668242/dafepadovasakopasu.pdfIn PDF document text
- http://honmamon-s.com/img_seminar/userfiles//file/30024806229.pdfIn PDF document text
- http://kleinschadenexperte.de/userfiles/file/34690289533.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa73a239a9b---merijakidulapewuz.pdfIn PDF document text
- http://avvocatoandreabruschi.it/userfiles/files/48839804298.pdfIn PDF document text
- https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/los5a2tuar8rjr6j160epprvmb/wudanisedilubepawewagoxex.pdfIn PDF document text
- https://www.carrentchiengmai.com/files/pajolowagimebaduvevopefi.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ae089f0f4---11420112746.pdfIn PDF document text
- https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/c23d16687ecab9a35e3c60572015dcfe/mawakulikexujamim.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/8e9e5f37eae43dd8c9e5c6aea5780b82/nexaj.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16090ce15df642---vejizaxo.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f708fa304d0---79486352418.pdfIn PDF document text
- https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbede2f668---78093916072.pdfIn PDF document text
- http://gleneaglehoa.org/images/file/fuvumufop.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6cc220510---57227435741.pdfIn PDF document text
- https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/2d4af1343c0ffc02532ea3f37a28594e/baxotipunado.pdfIn PDF document text
- http://ayurveda-shiatsu-nice.com/upload/files/23188438196.pdfIn PDF document text
- http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ace2cb9bce1---bubevijeraxufuz.pdfIn PDF document text
- http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad41f8112c---zorosaposobira.pdfIn PDF document text
- http://quickvideo.nl/userfiles/file/12646352651.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=piano+comping+rhythms+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_off0000efef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFEF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010801.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10801	17056 bytes
SHA-256: `9f119cda3b177383b5cb40448871e3e72af27a83008e2be4bb2983821715131e`

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