Malicious PDF — malware analysis report

Static analysis result for SHA-256 391e49359a64fd8b…

MALICIOUS

PDF

89.0 KB Created: 2021-08-26 02:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7e09195ee169f7433b40b70eac24c3be SHA-1: 91db9ddeb54568b8571dd15678b408edafa84015 SHA-256: 391e49359a64fd8b4ba0c92a779d6d406095a17a836ed495789860058741a989
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains numerous URLs pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://nomylo.ru/uplcv?utm_term=subtraction+borrowing+from+0 PDF link annotation
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/28dae2188f681c2f9cc14fd4715f7be0/zarafamubipejamamo.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/19816600646.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/76449755643.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/4eda4fcbbf1d03a697345c028269b119/legimaguvatafumipedovu.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/eb0ecbd325f761446d7f01862ad8e7c7/tapumi.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e2ac5b2929---xekumigowexewalonap.pdfIn PDF document text
    • https://trongtrucsolution.com/uploads/files/xaxonevif.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gexitigurizipoli.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/f26fee222e60778f1279e269e97bb7cd/migigezum.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160ae4b6ac29df---kipeluwaragababito.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/nexaf.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/37083581274.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9f9500cc9---45715459481.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/48ff2279a297fbc10d443294e1a062d1/26608410215.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/97523204862.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ijg7ftoknhams2aj17hhbuth57/zovolemokeludenokomiwijok.pdfIn PDF document text
    • http://nakakinpump.kr/fckeditor/upload/file/33692294191.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/435301757305e9471c5d00a175c6b345/25281568789.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/vojujikolawalawexoze.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/55633501593.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/ecf2d27fb78302add37acb649f566a45/pofazebanofevu.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f76d6ef0702---xubenopafamajef.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/2a7109aecbacfe1b6d0934a9f7da71ae/mowenizexiwubuzel.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 16452 bytes
SHA-256: 0b1c94fc5aea16ad4641408453fbc084371789c85b96d671bf02e3c3de6fcd5d
font_01_sfnt_off00010bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD7 10856 bytes
SHA-256: fe28f8b9884320998c8139b8703ecef29a5f4babe300af7b2e5e70d63c2b0cb9
font_02_sfnt_off000124fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FA 17356 bytes
SHA-256: bcebfb3d5da274c7a59587d929080a9ea63e2704bbd4e600d9d91d596ce4c663
font_03_sfnt_off00013c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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