Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d9dea68eac937b…

MALICIOUS

PDF

86.1 KB Created: 2021-07-19 16:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d08eaac3207a88892cd4f5fa935c5769 SHA-1: 79320ae2260ded587ac24955abe3a811f08cccaa SHA-256: 14d9dea68eac937b6985c27f70106955ba454856dcfbab79089bacf667caccaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm. These links are likely used to direct users to phishing sites or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8147b1d6a---88746037750.pdf In PDF document text
    • http://scheidenschiedam.nl/uploads//file/30403926432.pdfIn PDF document text
    • http://hjtech.org/admin/upfile/file/mikapob.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/ab8e99aa0bb394e1c6b404810083f76a/gamipigebe.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/55881256297.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/daf25qt3036r6fbt24ivjvq51t/62107244321.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/43213149019.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/19p0pgfh5sg7p6fsub9ds3r8to/66755223998.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/60493166325.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a88b682bf35---vesejesub.pdfIn PDF document text
    • https://angkagenap.com/contents//files/rosuvujagot.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/qcdss85cuflaqeqlp0vcdi3du7/xawomoxidoxinuzetebedu.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5998006b4---jajaragosotarivododozodop.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/f8655da78bc2b5f6cca8d7a12459a4fb/64148418902.pdfIn PDF document text
    • http://biblioteka-belzec.pl/upload/files/vojamoxijifawopebesagom.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/83120926741.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/meridebezavi.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f54f248719---13686047034.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/26674077599.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/vegujosiv.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/85811415096.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4f577beda---78359073160.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd550736ec8---16715472784.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/f352d39ccc11d713acc1aa6f12e9bac5/gedipigidakabowutefosu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/cec029ab5fe015e7e62c228f5fa2ef93/mimuzebi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=married+coworker+flirting+with+mePDF 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_off0000efa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA2 10924 bytes
SHA-256: b51cfccdd71b9288ef9d2648016905f0007f03b28b6cf29b4285ef76525dfc30
font_01_sfnt_off00010894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10894 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A6 16488 bytes
SHA-256: f8faafccd2dd520849901b80f26b0ae9517768f21093f71930c69741593b5708

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