Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3fb2a5e122b673…

MALICIOUS

PDF

81.6 KB Created: 2021-09-03 22:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 37d0f79d651a9629c35ceb3b58645e4b SHA-1: e4f07d0ea00073714b02be1e2c99cc5fb58cd23e SHA-256: 5a3fb2a5e122b673de09a9da782d816e471e0f14589af2e81fe5507827a3b334
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS uploads or disposable hosting. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://wastran.ru/uplcv?utm_term=reumatismo+palindromico+pdf PDF link annotation
    • http://ahlhy.com/uploads/file/020709346150.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/xepisapubuxetebet.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/niravubuxusipefoja.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021518316527807.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021061404510480554.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/meputi.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e859aad5667---neguvijopizuzawe.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a348370f546---65135597287.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/sodapunazenavifu.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/fovuwirigaxavuditujexulaf.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9040afb17---lanulekubetipututib.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051420464438.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/99139415055.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/13716529595.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/4183267606.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f13f86b3e8---51287672660.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/31329544590.pdfIn PDF document text
    • https://tl-systems.hu/files/files/zemomuz.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa1af5f04d---92979891134.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a22b726441---85857979603.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/90851470298.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3726677b1---64080028018.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/83217954898.pdfIn PDF document text
    • http://apvn.info/userfiles/file/43902640171.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/95593915911.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_off0000d922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD922 17844 bytes
SHA-256: c501c1625ee43e2537cfa1fcaeb3e78e364806fa3027b25af00d908c924d7305
font_01_sfnt_off000107ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC4 10928 bytes
SHA-256: 2189e7d9337c083a33cd88fc382c60b46393521ab4fe69f3c4ed37a4b40d3e7f

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