Malicious PDF — malware analysis report

Static analysis result for SHA-256 595045b0dd347e3e…

MALICIOUS

PDF

79.9 KB Created: 2021-09-04 03:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 30cafb08a72042c366e80f014ea41c0c SHA-1: 19548e4289c8128673a14373f3c5e1d47b41fcd5 SHA-256: 595045b0dd347e3eeb51951c5472ed2b638af8b659bc3e2bf35edb998798a440
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of multiple external URIs and link farm heuristics suggests the primary purpose is to redirect users to malicious content.

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 https://luminex.pl/upload/file/kujobejasoresulurifoliwup.pdf In PDF document text
    • http://eurolocal.info/sites/default/files/images/file/gasenuzodopeko.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd1bf75ba6---danepane.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/ruruxebodumul.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f31a90c5e8---34573197758.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/5110e749f2caeadae434cd0a30c73150/sitizosazuviwurewefuna.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/sogidijinu.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/qi8qv7uo0onllva7d3ab0vhjnq/figiragefunoza.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088fa2206bfb---zimemifitilopapeti.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4782531a0b---57192077906.pdfIn PDF document text
    • http://billsky.ee/files/file/vulixipemubip.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/gigam.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/918d3b0609088e03cffcb4804937b4a3/85103386816.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/vakizu.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/palumi.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16120514ce222a---59887565046.pdfIn PDF document text
    • https://actor-conseil.com/files/file/8420483179.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091fc701ab66---jelopupepirukebelepulod.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c751885602---riposeru.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bda88b7e16---mejivujakipazusalibexo.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/20830024703.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/87415489918.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/qqjqe1os93unf467eppj6fa5n6/pexoxopozimagaweta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=decode+base64+string+to+pdf+c%23PDF 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_off0000c6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF03 11136 bytes
SHA-256: dfcdb6e084d8f7b0a3602b3157f787a97bebb961dc6aa75252661dbddc215c3b
font_02_sfnt_off0000f8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C4 21068 bytes
SHA-256: 5f0b64e2b0cae9840e930e8d905a6cef836957687beeb77914ebdd3864b05b0d

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