Malicious PDF — malware analysis report

Static analysis result for SHA-256 30447db21e69273c…

MALICIOUS

PDF

73.5 KB Created: 2021-09-27 19:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9521280d1d34f52c4acb4d60284011c9 SHA-1: 6381688902657440d296289d49d381c80dc12bfd SHA-256: 30447db21e69273cfd3d8fdb8bc7585ae5bbce3e93feae88a75ea396abacb9a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure the true destination. The ML classifier and ClamAV detection strongly support a malicious classification, likely a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://allytemp.ru/uplcv?utm_term=app+permission+management+is+closed PDF link annotation
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1615158bd5079b---45640204341.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a54b93f52---kobejapozenuxuranili.pdfIn PDF document text
    • http://clingac.com/d/files/funiloxorimer.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/92277111273.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/5987a3e51e960927cae69fb8bc648235/xesameresijorunukuvawo.pdfIn PDF document text
    • http://e-district.org/userfiles/file/pukosejuxusewatewul.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/mexejovumikokobekowib.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/4735144525.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/8217032404.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/da45f544fc2225c261f037247c31f7de/34175991778.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/wimobojor.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/65652194864.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/donubizaf.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/kokawid.pdfIn PDF document text
    • http://xn--80adib9cjd8a5e.xn--p1ai/i/upload/files/51718963502.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/1609160327.pdfIn PDF document text
    • https://aaaxxion.info/images/file/xawisunazoxot.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/68656990471.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b70f887fbd---tejijajusipulamoze.pdfIn PDF document text
    • https://shiksha24.com/userfiles/files/31788428022.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/46144125838.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fusigo.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16135c08442d4f---wefabudevoxuza.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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.

FilenameKindSourceSize
font_00_sfnt_off0000b5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C9 10836 bytes
SHA-256: 4831ef9953dc016354ae965b8be15bfcfac293086dfc63072ce7f24d1d293158
font_01_sfnt_off0000ce97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 18436 bytes
SHA-256: 364f9c920278caad79093e40b90788976afb7e600f8d984928a18450a6d65211