Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a629b39cc64d74b…

MALICIOUS

PDF

65.1 KB Created: 2021-09-07 15:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a59a4f132d45f353d16e3e8ee0814614 SHA-1: 5180d3f3650ffa6d6fa5fc97773f5f10d90e99ca SHA-256: 2a629b39cc64d74be888a6015542552040af50e07b4325e29d2176849f2e9716
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. This behavior is characteristic of a link farm designed to direct users to malicious content, such as phishing pages or malware download sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9524

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 https://pixomot.ru/uplcv?utm_term=domain+and+range+worksheet+%233+answer+key PDF link annotation
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/07f91092d44b868625d51a8938e471ad/jedobapotuzagegomiwenu.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16091e3f63cc7b---54008040564.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3da0773b4c0f8f85e5dee5a6e499a98b/rugigomewotuwudipejema.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e2f8318f0d93ca7d63378de902184b49/zaxoxitiwufovunut.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/pukewinalalo.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/pijisovavawiviw.pdfIn PDF document text
    • http://come2menorca.com/images/file/dawowoposik.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/miqasnb1mn0smkc00399a45es4/zavizuvirusaduso.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a33338c001b72931a572f0430d2e37a8/55669235435.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609304b23e645---jezed.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/kajimusinokowexebubusoxa.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/46768271710.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///18766158162.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff2450592f---kitodelagosepane.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f13c748ebb---mafokiwibede.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/mawivawukirimowepebofo.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/86f804e93b0191da7a9400c44426b720/15790495251.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/23489558991.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b510a00f914---91723469064.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/zukikufego.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/keroloro.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57670eee24---72683078451.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3C 10828 bytes
SHA-256: 9957996cbc2143f163b1a88b7ef29b6e13f7f623105b14250fd92f9be2ce2d79

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