PDF malware analysis — malicious · bdbd2291e31a4c7c

MALICIOUS

PDF

51.6 KB Created: 2021-06-20 05:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 48490b8b11f72b9cec79ffc80bde7ab8 SHA-1: a5e0148ccfcd602a311bb7ba64906e3ee104dc6e SHA-256: bdbd2291e31a4c7cbe94e7d3e9f17e1b56e1565982916ce86e1ba2dcddb34b08

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but no direct instructions or lures are readable.

Machine Learning

Nyx PDF Classifier malicious score 0.6925

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://riskhedgetech.com/uploaded/file/1872367155609c15d3aeebe.pdf
- https://scheidungsrecht-best.de/userfiles/file/netigosisubinovexe.pdf
- http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8cbb0e35e---72181991015.pdf
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99cad24ac---66697592641.pdf
- http://jyjwqj.com/uploadfile/file/%5C/2021060800213773.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838d9d9c07e---dupukodoresofoge.pdf
- http://fly.no1-yes.com/userfiles/file/89135699284.pdf
- https://gregor-biffiger.ch/userfiles/file/88912584718.pdf
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/nfp0e00p0dgg6lmh2fsumrrhul/kulewodek.pdf
- https://hospvetcentral.pt/site/upload/file/38439649946.pdf
- http://limoride.net/gallery/file/wotuparopum.pdf
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/rf1780kbtg1ng2uhqo7lsfu8v8/sovajupefaxomevure.pdf
- http://maynenkhiinverter.com/media/ftp/file/tujoxitejilakajajava.pdf
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/4nrela796n38raq3kv537stsku/97434468867.pdf
- http://mariamozharova.ru/uploads/files/10810381594.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=exploding+kittens+pdf+cards

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