PDF malware analysis — malicious · 45afe42f1d3159de

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 16:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: f93050b16d61b4d0e9dfffe6de2bfa18 SHA-1: 473af541575eae4c85e4c5c54bea2dea774e33b4 SHA-256: 45afe42f1d3159de93c99e90464c6db9ae1211f3c72eb8962142810d0deccffe

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, presenting numerous URLs that lead to potentially compromised or disposable hosting sites. The presence of external URI heuristics and link farm indicators suggests an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.7248

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://budka39.ru/files/guseramibis.pdf In PDF document text
- https://alpinashop.bg/files/dotade.pdfIn PDF document text
- http://okuninka-biale.pl/userfiles/file/zutumuvogowujejekif.pdfIn PDF document text
- http://donkaew-furniture.com/ckfinder/userfiles/files/40814873545.pdfIn PDF document text
- https://xn--80ag1a2a.xn--p1ai/files/file/29896192941.pdfIn PDF document text
- http://gfk-schwimmbad.de/i/File/febakasezinovikek.pdfIn PDF document text
- http://winterwonderlandzundert.nl/uploadimages/files/nasaf.pdfIn PDF document text
- http://konsultacjenaukowe.eu/Upload/file/51814598836.pdfIn PDF document text
- http://tetobox-budapest.hu/uploads/files/kopefek.pdfIn PDF document text
- https://halkapsikoloji.com/userfiles/file/69404779781.pdfIn PDF document text
- http://dtyxbpzx.com/filespath/files/20210911094731.pdfIn PDF document text
- http://geyuping.com/geyuping/uploadfile/file/2021091321491773499.pdfIn PDF document text
- http://alrehabourhome.com/userfiles/files/fibasixaguduwawigoratoko.pdfIn PDF document text
- https://kitapkaplama.com/upload/ckfinder/files/pexikeburomeka.pdfIn PDF document text
- https://laundrybyconrads.com/nbloom/fckuploads/file/mivogevonesata.pdfIn PDF document text
- http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc71ae43bf---52916955302.pdfIn PDF document text
- https://zoldlepes.hu/userfiles/file/jimuzokopujusapuwi.pdfIn PDF document text
- http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/c5lmb4ofskr0tvaa6pds93cjk0/sogiwajifibibomotixun.pdfIn PDF document text
- https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/5159033000e0bbca293e6c2ada857fcd/32271538760.pdfIn PDF document text
- https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/rubos.pdfIn PDF document text
- https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/v8lb2tic4bonshm803fbctcbf5/65863700570.pdfIn PDF document text
- https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/penofubodibu.pdfIn PDF document text
- https://miet.hu/kepek/73909634779.pdfIn PDF document text
- http://lawyergz.net/uploadfile/files/befutakapasijumubol.pdfIn PDF document text
- http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/rifegirikuzimokopavet.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=avengers+end+game+streamPDF 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_off0000edaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDAA	17100 bytes
SHA-256: `362913b6f76f2788485acefb5ec71887845871fd223791149e4f307d464630cc`
`font_01_sfnt_off000119f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119F9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013210.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13210	10380 bytes
SHA-256: `6d337d1bad02b6fa02a2548f347a1a2bb655842dfc5d6d19f66a5333df621c11`

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