Malicious PDF — malware analysis report

Static analysis result for SHA-256 68695c9c739d6d42…

MALICIOUS

PDF

75.7 KB Created: 2021-08-13 21:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c2b03ffae9b7d18f68d118c7655c4f12 SHA-1: 58a654f72eb4fe4b326ebe954532845e0e9a3584 SHA-256: 68695c9c739d6d420a156b8155c99fff03b2f80ca18e4601179345f17fc1f68d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is unreadable, but the heuristics indicate a pattern of hosting potentially malicious PDF files on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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
  • 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 http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0f4f08735---25824563053.pdf In PDF document text
    • http://sadiqandsons.com/userfiles/files/togiremuwetoranol.pdfIn PDF document text
    • http://teplospectr.ru/images/files/61433249139.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/fevofebevazutalu.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/bawenukagerawuxerazi.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/sidasosikuzoxavobe.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/xetanujupejepiv.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c9dfddebf0d---28439048130.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8defd44c9---81422758394.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/9b2f0a912aa7d4af5fed5ded5d54f012/80004772574.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/59f9b8f76f1ef6446bca988795f3ff2d/41213902782.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/885811181.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/7cde0f31067025415951ec83f6258d84/nitoruwajiv.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/841c1697d851c7ea0953fbd68b9a3e72/mawupovowimutubexoxifut.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/dunitenazipapakedasebog.pdfIn PDF document text
    • http://boletin.alicantehosteleria.com/lib/ckfinder/userfiles/files/dukaboxesafiwe.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/ragumawewigim.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/161082d81425e3---molagarigojesatijowejoso.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/94079617958.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/zorabusoxisalawuxu.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093fad1d9edb---dajapebopere.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/18425601553.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/ol91uasmtu0ah0uap9qss4nrv5/xobozanawavelexuwupuvo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=livro+pablo+mar%C3%A7al+pdf+gratisPDF 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_off0000be0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 20236 bytes
SHA-256: 1f62e200f55b50f2a87c49807a9fd21d7d1fa171fcb72a1f3670b1229e471891
font_02_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 10968 bytes
SHA-256: f42ae8019ca9eb8e60160ca1c488d28c4587bf20d30c865e9ad0e21bf3159031