Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f39f5858b0cc5b…

MALICIOUS

PDF

86.7 KB Created: 2021-07-06 19:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 94622021f87ec36bd48013efa3b75cfa SHA-1: 4ebcf2855402d83df229e57733c518b03cd37cb4 SHA-256: 19f39f5858b0cc5bc8b16fffc797e82d470af77967ba87d497b91a30b319f3cf
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that form a link farm, a common tactic for phishing or distributing further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4150

Heuristics 5

  • 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
  • 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://huntic.ru/uplcv?utm_term=dog+moving+tail PDF link annotation
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/b39db2936be3a59cc72129e22992c70f/gebuxapogusamojutunufipe.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/rezorafuvekupi.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/80619353440.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/35376531589.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/94026769681.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/1ebb4cdf663c2789dd284e0e48507851/15715375786.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/mebogigadorozejufutujo.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930544d8985---21259126153.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/dufuvubelisew.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/limololure.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3dc850e07---gowavogifonasuboxegokuguf.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/73697169214.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/737c420c0d355f16bb0fb26bd369d2bc/maxavesinuxure.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/62a03f09a96774ef3679da7439592704/wuvadupol.pdfIn PDF document text
    • http://fedoro.ru/upload/file/jidis.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/58866125784.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfb7d7571---xizazunot.pdfIn PDF document text
    • http://learningkey.org/userfiles/26354154244.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/03f9c9ecbc442cb0f3f0a4a2f4bf5f67/votolufitonararipes.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f377444fbacee30b69d6176e1a3b4b0b/67751951209.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef1c889d2---gapefuko.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/lafasigu.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/90af4643ab4a065772bbd05c15eb6d78/zetevesodefidedikilar.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b87d909aba9---75401750257.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_off0001054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5D 16524 bytes
SHA-256: ecb1a55c9922966da1c35a69b516a9ed2b60ef4173858344241d96e9d5d898bb
font_02_sfnt_off0001484a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1484A 10120 bytes
SHA-256: d3edc8d9be15dd106b66f634d3acf996a7c9b1134fc88fd42f88b1e38b750948