PDF malware analysis — malicious · 9b508009d1e4d7e9

MALICIOUS

PDF

80.4 KB Created: 2021-07-02 21:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: a7438524223fc2972e4efc72449f00d1 SHA-1: 837367d500a2664105c5bf87d4a9dad37c9e00ba SHA-256: 9b508009d1e4d7e93f32ce5b24653034caf1b93fc1b1d0a1a70b129e44af706e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing sites through these links.

Machine Learning

Nyx PDF Classifier malicious score 0.7437

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://revtechnik.cz/userfiles/file/tavurasidov.pdf In PDF document text
- http://3wsystems.com/shipinc/userfiles/files/waziriva.pdfIn PDF document text
- http://autoshiftbid.com/fckeditor/userfiles/file/24036924899.pdfIn PDF document text
- https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1364119a7d---37753197892.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/n17e0j9ftic9q1lioqakdjpdgl/59905595201.pdfIn PDF document text
- http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c501761cf---pevuj.pdfIn PDF document text
- http://szsahsh.com/uploads/files/tipeminewozew.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/sukimobigukedamuto.pdfIn PDF document text
- http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160792a8558bb5---wukepuzajudezeme.pdfIn PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817b431fdaa---71684561413.pdfIn PDF document text
- https://thingstodobahrain.net/ckfinder/userfiles/files/fozulipudufa.pdfIn PDF document text
- http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b9038d48c---zuvososonuruwirewuguduj.pdfIn PDF document text
- https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/2c79969e3717592fc8cdf0336c6b70bb/datozukitajibulexu.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/ad385746fa5eb2c74bf656d004f7083f/wimenibesopijaba.pdfIn PDF document text
- https://bnbcostaverde.it/userfiles/file/rimepitepanodol.pdfIn PDF document text
- http://voxel-avocats.fr/uploads/file/laxizekitike.pdfIn PDF document text
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dff0c36ac---97011771265.pdfIn PDF document text
- https://yssnewlessons.org/UserFilesTwo/file/dadilevazewarukubu.pdfIn PDF document text
- http://madonnina.info/userfiles/files/kexarujoz.pdfIn PDF document text
- https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/oin5gc9hhronljr7aou6hdoq8n/21702219606.pdfIn PDF document text
- https://arrayamed.com/userfiles/file/61771443961.pdfIn PDF document text
- https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/296191db0c86805fea28acff2feefca9/76429538999.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=afk+dungeon+idle+action+rpg+modPDF 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_off0000dde9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDE9	10968 bytes
SHA-256: `d758fef00fe397a634a0540d906e02fdf2ac7d9c2d84645fa50919659ea7628c`
`font_01_sfnt_off0000f72a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF72A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010f37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F37	2376 bytes
SHA-256: `e57da785d3d7547c7486bc7688f170cedbfa8a02d328d9426e0ea30d411c9727`

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