Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae63c4563389698…

MALICIOUS

PDF

86.4 KB Created: 2021-07-15 15:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 66112d89f1b6a7b187a4e68fa2a8f501 SHA-1: 76f66ee5c2c7a26cf6df9f0ce0859633592dafb2 SHA-256: cae63c45633896986ddabbbae5ffa8fdf3bb1d3d0095118eb0b6891fb1a70d84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains numerous URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://coretry.ru/uplcv?utm_term=how+to+insert+pdf+attachment+in+excel PDF link annotation
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac1fdcb910---kebosafovuvunovoviv.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/55vsqtdbhfgs1emkf3q5jnm0ca/69682773523.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607052a7ebd79---nevafobebuzusodorebawume.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210710_8FDB386D7583A476.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/ee6ebe7b136565a47ee33875f3e79350/sifidinumiz.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/35457077810.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/81603760320.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9701609676---40188421319.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/30dc89a703e97b2815d55b3bb3862815/74340964699.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/mafilasoxigijonona.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/icne03b7cidga2bbv0je2lc0at/fenuvixulafudajotupokavi.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/23tpj4nk17ju46njoi5pjonsnv/84036787471.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7818d6e56a---fopavunixadusitoper.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cc45b1446ab---nixasewomapijupamum.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b6da7136ca1f9dfd1e21423315238e6e/raxedamabew.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/weguvoges.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ndudlt7acua481rgsi521ae08q/9875671401.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e109a8a83ea---29356804603.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/79886677904.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/fijudatukumofuve.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/14548980239.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608316d0ef04d---20789037153.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0287b5b8f7---3747155987.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_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001039c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039C 11064 bytes
SHA-256: e84bb981b8ffe81cc33c29c19b2f0dd0ce7db8295a57a4b36c1f7b68336954ac
font_02_sfnt_off00011d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D39 17224 bytes
SHA-256: fafa0239ca27d35ad17e60c0234dfb90b7a0b5c3da1ed8653fab8af9d42aee22

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