PDF malware analysis — malicious · 568984e91f17294b

MALICIOUS

PDF

62.5 KB Created: 2021-09-07 22:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 536bf0069216fa02fea282b3b917ea7c SHA-1: 41ebdb67776c21c63e4b4c7cc20ca84f7191e4b2 SHA-256: 568984e91f17294b7d5d0c1a8a216da5cc3e729726c05ad16c00cdbabc62032b

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories. These links likely serve as a distribution point for phishing content or further malware. The PDF's structure and the presence of multiple external links suggest an attempt to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9569

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://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/bupawuvodazakabikere.pdf In PDF document text
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bf1c8353d---16424443683.pdfIn PDF document text
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888239265a1---90513781800.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/n2lbsuuk16k6l2mm6kobl687g7/58516583580.pdfIn PDF document text
- http://garderoba.sk/images/_file/nubewuzabuzulomuga.pdfIn PDF document text
- https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/f3hgokinleuqrikefmsbbfi4q6/54464273622.pdfIn PDF document text
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/63afd3511afcff025bfb772367d65d96/20598323605.pdfIn PDF document text
- http://stroytehcentr.ru/images/file/67992340398.pdfIn PDF document text
- http://dostrojar.sk/UserFiles/file/jezenefos.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/8df1ccd47523af2bce774f3fee810870/jezeva.pdfIn PDF document text
- https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/baf02ae23690d12c96b4dbc118d5de2e/18645057412.pdfIn PDF document text
- https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/08568b7e1d993bbc6b13b622a639fe6a/foxawizewatozijaj.pdfIn PDF document text
- http://acmemask.com/upfiles/editor/files/55337712017.pdfIn PDF document text
- http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/42998512475.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0ef0adb192c4f799b496ddab63e7c59f/nevemozodojonodoxelevipi.pdfIn PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c6b861d59c3f17ee2c4950f2746e6f7b/62731575752.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5922d6aa8---xiligomalavupobasu.pdfIn PDF document text
- http://dr-temt.ru/images/file/gajenore.pdfIn PDF document text
- http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f2136109d---tumagebu.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ec14d1da6d84cdd0a4239e23aeaed419/91756741498.pdfIn PDF document text
- https://burgas-remonti.com/userfiles/file/63929106151.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=nama+ramayanam+lyrics+english+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_off0000cb6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB6C	10940 bytes
SHA-256: `6154e944c80bc6ad257da55cb31ff002775a9dee128849d9178eda1fa26f458e`
`font_01_sfnt_off0000e454.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE454	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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