Malicious PDF — malware analysis report

Static analysis result for SHA-256 234519185a1e3f3a…

MALICIOUS

PDF

94.4 KB Created: 2021-09-05 07:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 11f8304269350ea6956a4157cfe394c4 SHA-1: b0b36c258c0dd1da479acad9b9de5f25bbe23210 SHA-256: 234519185a1e3f3a4ba9d8ddbb30d2132f96318792f0f105cde10d1aa712ca21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to PDF files hosted on compromised WordPress sites and other disposable hosting. The embedded URLs suggest an attempt to direct users to malicious content or phishing pages, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9637

Heuristics 6

  • 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
  • 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://bishopsalamatkhokhar.org/userfiles/file/50557891668.pdf In PDF document text
    • http://toonesk.com/upload/galun.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/zuvarosob.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/70957180407.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/rifewikexu.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/69019465955.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/e1c4ea0e2bce9ee0344efb92a1554c75/94667823834.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/zobivu.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/5a241ed521b4f12e74446e2fe172dc95/68360046108.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/29640317043.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/zotux.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/ladix.pdfIn PDF document text
    • https://slide-bearing.com/d/files/59405029981.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/58771555927.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/lefamemunetotaronebuvazaj.pdfIn PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/29502404328.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ed40cgldq2bvof0hk3jk566ub0/vilovoxoxijivaw.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/776be8d1ddebb5824db72ce18aa1f604/lamibifesi.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f1624e03ac2fe130d6940cc87e670414/91618135091.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b61422384a2---wukiribevedomimizivur.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1610ec5fc60e3b---burufikizogawizofusilawot.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/sakuzupar.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a328a7157a9---ratirivawobanudit.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/javupejepifawileliseraduw.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9cd922c92---90527713086.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7525c1e831---gidufexulowufere.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=adobe+professional+7+convert+pdf+to+excelPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 10952 bytes
SHA-256: b8b3bd07c2f155fb8bddff637ae933af92a909e0e8214910d878dcd56a68f672
font_01_sfnt_off0000f609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF609 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 2180 bytes
SHA-256: 97459f30dbf796ba7e10e85d214c4d9ac69be4e0e6796ceedf15ad8b87579374
font_03_sfnt_off000117d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D6 16264 bytes
SHA-256: 25673ad1724b3caf92d93029fe3cbda1f931eeb27a147ebcd3b703d969e9101b
font_04_sfnt_off00012df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF3 22936 bytes
SHA-256: 77c3b640e3db698078270f912b77866966a4e91a96d36e98a3db7d468e1ebbf8

Open this report in the interactive analyzer, or submit your own file for analysis.