Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7d2404bc21d4cc…

MALICIOUS

PDF

101.0 KB Created: 2021-06-25 19:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 21bf39f079d8f5e91127300143a0a164 SHA-1: d163645dc4c167716b56e58b53e07884e6df89a1 SHA-256: 9d7d2404bc21d4ccf7d922e95e26b801e3de2f61ae96226f4f882c511548fda5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs pointing to compromised websites and disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://chcial.ru/uplcv?utm_term=nacl+electrical+conductivity PDF link annotation
    • http://creativeindustries.ru/uploads/userfiles/file/vefelapula.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4722946f7---33143069750.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/0f7444b61c56235a953d252cf5fde44a/rafetiwupebutidalumovisog.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/2893103156.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210519211708.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/soronovekepenemitegowugal.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851091d8c29---63171127668.pdfIn PDF document text
    • https://hse.tw/upload/file/30791173845.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/99945316120.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vlsnmn2mua7hoikefipr2lqu54/kamifefugebemaxi.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/11e37571a5da034ba06bcbd64e8cd7dd/gegudezorelin.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/30m9hd6omqqtlj3ria7kr2ub94/24204079695.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/lipogidumi.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9ecd07257---gupiwozikapajuvoj.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/48400566348.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/36a8b2b1badc91def232ef34877f932d/kudonemalera.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/52034705135.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/jqtsjjbtihm7pbgu5ism3clkjp/99755631754.pdfIn PDF document text
    • https://isleo.com/i_photos/file/kixesusajujozufusupuzovu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/e9p7retkvm5enak7vrtfnilhk2/siselexogali.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/5f24215bfed4be3c76e4f2841b59c305/84936872105.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2406b8392---bugubutolutalas.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/8juk90f9h7hkme4lnlnvc94ti6/55050979185.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/o67aqp1cr216o4vmj4j7rf99c6/84670725502.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_off00010bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC0 10452 bytes
SHA-256: fe4374841473fcf86939beca2ea94643a058ae70d06da23b0e4da507e1ce006f
font_01_sfnt_off0001239d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239D 20892 bytes
SHA-256: fbc9ff9c7b2dbee26c64424a61a49826e7975c325ae85b190faa6cf65c50547c
font_02_sfnt_off00015929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15929 16100 bytes
SHA-256: 505f1f16fb057e2a34e7666bb0a43a50f2e0b7bc0033e59b70183295ac12d2e9
font_03_sfnt_off00016e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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