Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f1ac1403f89901…

MALICIOUS

PDF

86.6 KB Created: 2021-07-04 01:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f9393d9f534c70dc6ee57b6f35e21aab SHA-1: 767b07bef31502a1bc72f4e67cfa0830e55b02cd SHA-256: 02f1ac1403f89901790680ab9fd2bcb7571aef823ded7962e640fa7515e533bd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics, along with the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' findings, strongly indicate a malicious intent to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure suggest this PDF is designed to lure users into clicking links that could lead to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=activity+2+double+entry+journal PDF link annotation
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/72107361438.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b33743f602---remumidemewenor.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf065082cb---xodapokuxir.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/lawale.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/37767651725.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1607a43b8dee19---momor.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/piwozolavesi.pdfIn PDF document text
    • http://mp-journal.com/media/file/2767109723.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/puputokufiban.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae434874c20---5826265691.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d839a6214---balaxagewemisok.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/18075462411.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/2d128bf8982bb7683f85eded0fb2da02/debolozimoxos.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/13017111463.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/todudazav.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d93deaa16---gelavuganemupofeze.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/wagesezuzaxelijexoruv.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/80783600806.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/13bfb487b2e6524392fb8f5f0d1fd86d/45306107981.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/kupudidezimum.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/46050591211.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/f4098ac1c0fb63be393972e5c5838da1/xikajadakudikafutagi.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/d824qfqog09abjbrrgqaqne5ca/54387878711.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_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10799 17076 bytes
SHA-256: 310ac8761368fdd59057bb59cbd29f76497682f5bb081286cf06127f21d48624
font_02_sfnt_off000133fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FB 10844 bytes
SHA-256: 203db517158cd683fe1db82f091cc1546957cf47f510ffad4294f244d14d58bc

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