Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1357f7a0e30648…

MALICIOUS

PDF

82.0 KB Created: 2021-08-08 10:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ebe2196bb99ee6358f0a1a564ae1f10f SHA-1: 0dc86e11f3dfad6a986830161b7beeaef675a545 SHA-256: 1e1357f7a0e306485fc48954b3f18e2d321fd8dd6241b8fb75dd3363170ca33a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malicious payloads. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a method used to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/52556deabff96b710f62e3f5855c9012/laveposulonetokiwikoxoru.pdf In PDF document text
    • https://jcmimoveis.com/userfiles/file/91321846192.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/6aee7d453da5da10ff52628e62e6a6da/52468472351.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/18c50e04819b2c03f83f664df7fd00a0/pebuxiwudi.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/bac8635b78c0fea765befc1cf9e66c33/jodotajusurodakuna.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/74996584071c473666d6284590daa642/xumuxiganurofek.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5431f26b03a2cc131516845db3f78f41/44200398416.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/122ed59f154edd66d9758d03038f9200/81233797954.pdfIn PDF document text
    • http://hasyo.net/files/file/pukivobabegovutedaxetis.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/wukerepowamomaluted.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/28453297277.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/kubelijesemeve.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160903d3c006b0---58186713517.pdfIn PDF document text
    • http://school15-tyumen.ru/f/14184486349.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/fivaxisajivuw.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/90042039091.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ddaf5ae30ff---38101398934.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/9c3d64d85369d3e2b24d7d428902f8ff/nupekijaja.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/c4lvj15j41k1oo301h2dvh7g6l/10053800832.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/0acd0481873bf9d4c096b8eea2c3bdc1/59152269327.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/gogikurexewofodinujar.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/zerozasewofafulinotatog.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/36142919571.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/168446488.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/ab09a24adadb693120dd93953c9e179e/kewefaxerudaligad.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/tigorupenimag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=manual+de+ventilacion+mecanica+para+enfermeria+soto+pdfPDF 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_off0000d8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AB 10940 bytes
SHA-256: c02193004eee821d34b5a4f8eea3d954195026cc8486786844770a3b173a874c
font_01_sfnt_off0000f1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 17596 bytes
SHA-256: 37c6061c6e50861db6a72e62a3342d93ce4c624bb7782aa3f6f93c73cf98f114
font_02_sfnt_off00011ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1