Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f3ab139a32efbd…

MALICIOUS

PDF

101.4 KB Created: 2021-08-16 21:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c15cad6ba8ca99ca66edfd5969e5be21 SHA-1: 6365bde67852214422af16e86a74d13693be597a SHA-256: 75f3ab139a32efbd6ffc1b57c49ef60544a99674f9bea2a7e2268725fa936326
156 Risk Score

Malware Insights

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

This PDF file contains a large number of links pointing to compromised websites, many of which are hosted on disposable domains or use SEO manipulation tactics. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest the document acts as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160764a0f4882c---javasorijarumasaxefixejow.pdf In PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/c182b072b11880005f890d30919325c4/naneten.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/18720774941.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab6458bdc6---dutatug.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a81ee77982---59689517589.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/07e641c01c49369c049a8583b52e120f/39177816853.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3ac90bc5d---67642922539.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/9850d27b85142059ff80003045ca2a8d/89229528523.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/78375549142.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8dd639b91---1546988796.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/236713324.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/90924350205.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/34063747184.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a723f5d518---14504426842.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/cj3992m8jk842dl8pccgrel05r/51087576311.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf2ebb941---20946948165.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/af17ac1701770d7560e228664f94752e/97917802235.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608eefcfecd36---nakodinesebasonogex.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108a9bf0c719---talatuwiredajodegus.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/8269337880.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c935ccab019---86518786987.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ce027c683---funulalemanefukedix.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16070c7add3b6a---xesagosanivasam.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/5bjtodl3svjd0uuesbb9ph6c9p/zaxozulapavitam.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/m09m2gnh4h1f8icapkm3h7ihv2/68026299235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=grammar+b2+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://web2.uvcs.uvic.ca/couIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BD 18516 bytes
SHA-256: 066c6dfa75a5427151b2bea6907bd2a2b82b381cdaa2dcc8ecbcfc5ae39d2c72
font_01_sfnt_off00014181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14181 10196 bytes
SHA-256: 12e86e766a1d73e2e50d0a4cfe9468f0f608d36d480b2bcff20f5aa759f88c11
font_02_sfnt_off00015820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15820 16236 bytes
SHA-256: 9f9c9255c0426c77c5b13ef22f4242f4f7095bfd8ba808a20cf1712cd58ffb40
font_03_sfnt_off00016dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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