Malicious PDF — malware analysis report

Static analysis result for SHA-256 63da15ba7b6ae8d3…

MALICIOUS

PDF

73.6 KB Created: 2021-09-07 21:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1b278b15e7c3104198e22e5361acadc9 SHA-1: 72286d0b2e743fb35eb004559d4f9b749fadd74c SHA-256: 63da15ba7b6ae8d3f9e929dc8495d096e68de5238027132e1cd9daa1068ead61
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, potentially exploiting vulnerabilities or attempting social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe3df90c3a2---renixaruwabafosemufamov.pdf In PDF document text
    • http://stark-tools.ru/images/uploaded/lizexekidamigudi.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/namarosigakuforetizu.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/228ad769a597ac7d96119197bac07170/90246333158.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60C6B5673E045.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/62550053165.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160badaf92ae68---fufegiguluwakexesamek.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160844a43960c9---21466318370.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/93793e4eb2e299072075a2703dbf2cbf/galobixuwufagomekokitoji.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//89882958780.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e06c3d863---wixikizogutepujilopopa.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082de1781914---mivebamix.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16100dd8d92fb6---nuxoxuxikezisagum.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c13dc79fcb---gifinogoxatabadir.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65c47ad5b1---22120914572.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/javizaxonanufovab.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/pejal.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/f4b61512501c97b8d1d9519a1a27c251/37100780430.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920d02e3587---52292351730.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/deluto.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/bekejip.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/37679182807.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/33527322949.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/67785949456.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/4582935429.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/53370c5a348c6c8957215a2fddcdcd69/xosuwujewe.pdfIn PDF document text
    • http://syekp.gr/sites/default/files/file/bulipi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=pesticides+pdf+file+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD80 16736 bytes
SHA-256: 1dfe11370383df5d7e2b89f445b71e2ec8f558c2798fd5ff0081926e7d7ff6bf
font_01_sfnt_off0000e871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE871 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 10600 bytes
SHA-256: 5258340b7dc7b4c570f77157052ac45d9bbdc1fea668aaf2880b405defb6fd77

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