Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7276eceaf5d1f30…

MALICIOUS

PDF

74.1 KB Created: 2021-07-03 17:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ae98785b104ee49462acaa8b554af15a SHA-1: e954ccdaa08c2b6a1ecaebab2d2fb5bb3b803b6a SHA-256: a7276eceaf5d1f3089547bdd65e8bf6f2122098abda556a1f085b0c7d8e6cff8
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other domains. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8303

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://queure.ru/uplcv?utm_term=types+of+artery+in+human+body PDF link annotation
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160844f746ce16---22422998847.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/t905nd7176nd8jr1pjlt6h2dg2/masekibukisavutufelor.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/b6e375a72369a489fe2ab0b1ed396926/86076358970.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/0592092ee9cc11f2f45f3a0c7a028074/82277455330.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/82569ce2acb7eb815bd1ce712552264d/duzopesomaledobefinarun.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/45523474373.pdfIn PDF document text
    • http://ballard1966.com/clients/22636/File/46848881567.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d2ae678dd---salazinamisanugigowip.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/27608958246.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82a8e4b631---55271486027.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/lcc9718igtepk3iuo97gsf4afa/zakibamudoxoferukivatem.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021050509311573499.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/30b480b63b1744f0523036b235a66181/428197411.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/60513838768.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/netidelisusofazetuxiwu.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf14bf4713b---judevobomupaxalowoxoz.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12c3e6fc2e---53300646945.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d038d7628fc---wuxegepe.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160961bf600ee1---marunip.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/lilujamosesozinepovisej.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/20111331109.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/f1489515dbdb501c9f0c8b283c841943/xonilajalej.pdfIn PDF document text
    • https://genegurumiraclehealer.comuserfiles/file/zalikinuresotufudavawe.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/eee0570e7a99d466cc2ab05a582da8f7/wisisower.pdfIn PDF document text
    • 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.

FilenameKindSourceSize
font_00_sfnt_off0000eb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10348 17188 bytes
SHA-256: 7813c2d8ccc439add2408e4a55ffcea245a227eefd95aa56ad9292e051a829db