Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e821ec7bba7352a…

MALICIOUS

PDF

104.3 KB Created: 2021-07-14 10:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 74a1ce60e921400e9cd154ce25d3db9d SHA-1: 34146d2a5ee9c1764ae3b06b142541d4cc5e70b9 SHA-256: 5e821ec7bba7352a04175619f3c8fda58ff9000fce4defdb1da10533e9912e6a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected by ClamAV as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and embedded links indicate it's designed to redirect users to malicious content, likely exploiting the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4394

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://medvor.ru/uplcv?utm_term=valkyria+chronicles+ps2 PDF link annotation
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160770fed78201---nafuludafap.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/powowigurotekig.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021062215533929.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/jhe18htlnmsg5to6aegsssn7ol/84626251005.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608836698c6ef---1370202929.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0d646cfc6---72468675321.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/29991174595.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/59770409876.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/4b23511b39d1af8e71a75ff9aef46d1f/xosepaki.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/49548925142.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ab784b3ea3a---5689844791.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/kajit.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/wizigarubafuzagukiruxuw.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160be49c19ef70---71812261481.pdfIn PDF document text
    • http://maihome.hu/admin1/file/dumafevi.pdfIn PDF document text
    • https://tekartltd.com/upload/files/roxotasujixuvapimizabusus.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/98afea32c5262e6b45e8276839edc920/xazokoginovesulesuretinif.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/nasanaronifo.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/753b6b3a9ccb1427c9b7ad44556ecec9/9659902073.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/midonoxodifidapepuripe.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ca069cb8aa905fa3679cea6f79a20d3a/6752809362.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/32996333759.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/wenomabono.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/5de7054ee0a5e7b7336c67f29c7b9615/10579121069.pdfIn 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_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD3 10668 bytes
SHA-256: a1cfb3de9c66a35f181f82ee931483b9b6d10b674f2be9e380bee592e8003036
font_02_sfnt_off00013544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13544 18192 bytes
SHA-256: 95d1ddd10ad2037fc83cbed6b2a2e5282d6abcfbc69e1776e0a9b47a1134d2bd