Malicious PDF — malware analysis report

Static analysis result for SHA-256 5223ce360f563dba…

MALICIOUS

PDF

116.6 KB Created: 2021-09-03 03:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6f411e0a6c3cf14a1ad3d4bfff19ecb6 SHA-1: 88a5783707094962d679ae1d961495db2e377054 SHA-256: 5223ce360f563dba760991e0d488879304b0ebf410f4f1edc1a61ddcedac37a2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages, suggesting an attempt to lure users into a compromised state.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=la+potencia+plebeya+garcia+linera+pdf PDF link annotation
    • http://e68momo.com/shopadmin/upload/files/96959044775.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/d98e59c3ebb98ed561faddc11e652cd6/relojolexeta.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fd608ad1e---rakolonejitirasuwojigid.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pl3p5sp6eop8s0mefglv373ms2/40017565268.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/jikoxelonujipuvuvexakuza.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f35b97a2da---zonejikaxenepubenojot.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/ans813phqq5r9kaefikconbhuh/62327114367.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/58576027173.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/8c815196ed9e75ed02c8bbf035106440/baxalafofodowopotunaru.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/gopovode.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb25930a56---puwemufotat.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/xedakotaginugigegelif.pdfIn PDF document text
    • http://webbuilders.com/files/file/46834282262.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/64611974376.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/manex.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/topozoxedemerunurigas.pdfIn PDF document text
    • https://jin-ji.com/upload/files/78073142954.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/7828d6a56e1be3487e334d6c425dc200/56765457229.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/makesujevorivelewis.pdfIn PDF document text
    • http://sclifeguards.com/clients/16854/File/14908992873.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/77625080563.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/josusoxu.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/26442911.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/cf4fb56304bee014cba9d6e2a712dbf3/gopufodofutukejovejok.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/67252019469.pdfIn PDF document text
    • http://tai-group.com/upload/files/20108601702.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_off00015ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000176cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176CF 21056 bytes
SHA-256: 731cea1b1f18284bd1ea21a4d657d00a3faf72b7bd62cd7e70614706fdfb2b08
font_02_sfnt_off0001ab95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB95 10840 bytes
SHA-256: b17ca27afd275dd9ac023618b3fe230f9136746c4fda8b81e6108860eb60fe49

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