Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f04b27d40c4e27…

MALICIOUS

PDF

89.2 KB Created: 2021-06-30 03:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ebb203dc76f241ebc4cf6fcd1ae55d1d SHA-1: d87c1d8eb34feb61a5bf7eb3a9e8834bbd259d6a SHA-256: e2f04b27d40c4e27a81e44068efbb972dcc9170aec54fe9e245630f8e35c9ace
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's part of a phishing campaign. The primary URL, 'https://ketchas.ru/uplcv?utm_term=download+zolaxis+patcher+android', indicates a lure to download a 'zolaxis patcher', likely a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://ketchas.ru/uplcv?utm_term=download+zolaxis+patcher+android PDF link annotation
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5da16c35b---sabafonivasobisinobaloxov.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160abc7d719510---tezivinezamaravarul.pdfIn PDF document text
    • http://king-ber.com/UploadFiles/file/20210613112122806.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/26f74ab48a2970f052cdb264adf3a16e/jizodet.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3f67af9b3---bodasuwovenebelosafo.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2192a8d11f4ee833018a6994c583a843/sinuwajugazimilesirevorul.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d3e5cbfc89---98815908048.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/83148020792.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/af4ea716e82d01024fbd04fad05eb4c3/66551126064.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e329c5c6e0---73086911317.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed5cd334a5---43215224494.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/79339877222.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16074f906827d6---voredosadosugen.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/22ba46f9c2ea0aac1f05c3692bb65832/70417215220.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9825729ee---4234253403.pdfIn PDF document text
    • http://polipack.ru/content/file/93122778206.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdab44f1869---suxifepokezu.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/ba57f2cbfc4ef33fe792407fd97dbec3/94189520251.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce730151ee---pilirixupalejijifedaro.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/bcb06e0d346f343065b7e0fbf235558e/65860841426.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/c0bdc4d0293e550af7fd822fdb963337/43981827459.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/293bcf3f87402b2c4dbfae8a07af679d/358847680.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/49625549351.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/kakogasukuzaditewopa.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f4c961b870915c3cbd466a177c3f02c2/sozezi.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/julokitew.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_off0000fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 16580 bytes
SHA-256: d4c36228bb1b55a25cbff69314f0ced6d1be4e1d04d611ede40747ee07e76a4d
font_01_sfnt_off00012615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12615 10860 bytes
SHA-256: 9eb58683f4220be2fb479ab1920453ec6d76cf697e7123459165461334022294
font_02_sfnt_off00013f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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