Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a41792243ca332d…

MALICIOUS

PDF

91.5 KB Created: 2021-06-30 20:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3acf4d051b1950e30e848e3f9bf9c274 SHA-1: 6d42630f0a123f62f471914c8364e7851f1254c3 SHA-256: 7a41792243ca332d46bf2433b698bb105b2ceb4a0db66870ced988d7a5873188
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/5gqv8aeak1g9kka7tehci67aq6/75213132787.pdf In PDF document text
    • https://aradovan.com/userfiles/file/84767727622.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/86ce391b9a60f5aabb2da0a1e6565b22/ziwapalulim.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608344dbbd92e---90839865328.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d60d381752d---42647224856.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/dolitotejusedurasono.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/donudunuxenovo.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/41aghh20gsca2tq48p0eq5ans5/wadakijetifuf.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/69951359483.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de41a835cf---jinurobesurikelo.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfec5aa691d---94248808942.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/130452544587.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/5d73d67a7617f25a8e2619da3ff8d66f/25777465261.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/lukujaxuwabidadig.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609468caeacf9---23296810165.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c089003102e---podekufela.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076b531854ff---nafam.pdfIn PDF document text
    • http://hintzfamilyreunion.com/clients/1/12/12a2788c5de59b93c87e4eff35998d4f/File/21222991058.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/moxikonupuvoremorijivip.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/niferavoxudubixop.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/7912263364.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/455afed7783c496cf1e71451d032a0fe/lufabuxurodukevoj.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/24208791332.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/mbvhv2ivbavap30tddcrjhsite/xixalutilipibogedafop.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/6ab4443bec09b37715bee57fe629ed6b/kitejiwirumejenizezaser.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765d570f137---lixarulisun.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/9656494474.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=upsc+2020+prelims+question+paper+answer+keyPDF 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_off0000fcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD0 11324 bytes
SHA-256: ac8ef46a72976f0356ddb4f2ef3bb6a3a6426747617f207cfc5432c6b485e7bc
font_01_sfnt_off0001178c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178C 18296 bytes
SHA-256: 6c390aa23083c87f882bc234498ff45a6adfa2fcdbe7d618a2b8043763cf3e09
font_02_sfnt_off00014836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14836 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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