Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e22c27da3057205…

MALICIOUS

PDF

83.4 KB Created: 2021-06-29 19:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fc4bb5aa4ce17fd25ecf7dd15965d1b7 SHA-1: 36f0ea6f527e90a681d643b450e6b6df737823c5 SHA-256: 6e22c27da3057205313a19025d1a24fab0a714d3281380a4e2a0fc152a45c874
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, many hosted on compromised WordPress sites or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://catamma.ru/uplcv?utm_term=rd+nutrition+consultants PDF link annotation
    • http://juha.be/_files/file/wulusevutedudi.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a446233bf9c---73240655341.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/h0adt8f7vvbbri22u24fv72s6q/55726903565.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e31f49931b---31113825468.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/20e5d5b9428eb46ba417a7ec2bb315a0/lusirikikewibepowirutis.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/03e448b9397cf48c5b4e9b425f5cb9e0/2550672428.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/plbpoc0bbnbshiuaejpup9dq3n/nukonubilunajubularem.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/69359809836.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/29127283671.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/ragebegete.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/2fq5hl2329jj731gdmbui29all/64084426416.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2560aa76a---4120065062.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/nubesavemusepenovorum.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/26055613028.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/wuvodu.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b68210db84---19893347604.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607815ef5a7f3---48327842568.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/tigivakuwibukivazow.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d901ef956---99523866796.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/70276236191.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/wananuxuzilurazakusolomaj.pdfIn PDF document text
    • https://oliogalanis.com/file/88729043828.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/afcd9a47b867d0ab21a7b7ee852f3f76/kazivofexobofapukedav.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_off0000e666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 16260 bytes
SHA-256: 1c12fa6acd1c89204ae15b05c510639aaf446984069697095e48bf8840d5a0b4
font_01_sfnt_off000110a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A5 10376 bytes
SHA-256: f90b7e22245f1b21014d2105db77fefe72f30c0b578037159112b26b8d894047
font_02_sfnt_off0001283b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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