Malicious PDF — malware analysis report

Static analysis result for SHA-256 606d0d249bb2097b…

MALICIOUS

PDF

86.0 KB Created: 2021-09-01 05:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0ab30711f16fb7627b7f2a1eeeb6d957 SHA-1: 5326687ba11b6f5452bc2226816708ef0789bdda SHA-256: 606d0d249bb2097b6323f3170dbc929a0b90a63a37bca80ec1a0e6e83702f1a6
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, specifically a fake CAPTCHA prompt designed to deceive users into executing malicious actions. The presence of numerous links to compromised CMS upload storage and disposable hosting suggests an attempt to distribute further malicious content. While no scripts were directly extracted, the overall structure and heuristic firings indicate a high likelihood of the document being used to facilitate the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608675c142d3e---zebewosoxibofuwikevisin.pdf In PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/dewuwevewiji.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd67546b44---tisemove.pdfIn PDF document text
    • https://kultmotor.hu/images/files/nenutaza.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/a374f17c36239d117cab53b37cdbe0b7/55361258649.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e17c408a5---lurepotolilalosib.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724ef83a7ec---25720519624.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/27518095926.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a95c570f5---94612621679.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cb388cf0cc7---59196456725.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/45111621628.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160883199c491a---bosikanitizowot.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1610e90361e907---16652422164.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/66930767288.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/p393jmr1ugc3t67u6f82ccnefr/ribako.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/72387532274.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf0bee6d3a.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/4864896eb1251a552439485f4f37c822/kusaxusaxeratifow.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/7cfffadb9e26a6830e076a1e0fd2bb94/fibawowasi.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/vejabizixego.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f0ddd447a---xuweziwan.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/86932422319.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ce079222e6f---wulemizigono.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/3c70eb614324cc0b7784d9c1c034757d/36810593963.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=free+roblox+exploits+for+macPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EF 10756 bytes
SHA-256: cac9bcd107479416d9cce323ec46927002f595616d08960e6b5055ee4a18aca9
font_01_sfnt_off00010178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10178 19056 bytes
SHA-256: 5fc5e714203e43e240ce4a6ce60ddc27ab9784cceb48b660297eedb81995e329
font_02_sfnt_off000132c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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