Malicious PDF — malware analysis report

Static analysis result for SHA-256 26980b103d00a1b5…

MALICIOUS

PDF

82.6 KB Created: 2021-06-29 11:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fca90aadf4a763ace0cdda18532b55fe SHA-1: ea14c32a36f5154ab7405b33f6c3c1bf976bd7b0 SHA-256: 26980b103d00a1b5648562fe4b35518ea009d534d1acf4d9acae5295c8756c3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pistant.ru/uplcv?utm_term=substation+battery+sizing+calculations PDF link annotation
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/1bbk3r0plcdccntvu9d7r8stui/guretokesigimabujoxija.pdfIn PDF document text
    • http://omg.su/upload/File/1651305373.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45bfa7ca88---25486680675.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160993abccf0cb---sagiwixeva.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/kuxudazolosadekekazupi.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/9ecgeie36pumgj3nc0sv3gqj80/41861209668.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/5a48773680bb09ffdb5ae42fafbd9bf7/12897598198.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9520cf087---pajanujemurusirepomubu.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/kifes.pdfIn PDF document text
    • https://inncredel.com/uploads/83682757614.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1a06027c0---munefunoki.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da6a4e110eb---toxulofidanuzufidaxot.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a92141dcae1---9968360216.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/26270508167.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/e0d03b0acd49379f4aedd8f160c78b61/bepuvunirabigu.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c524a1169c0---87806630549.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/iapnp56imkokcq4jf5cngkd4bs/88494000046.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/740c4567165fc8feb8ac40285e1166c8/60992826422.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/29310534641.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/sexatakeziwa.pdfIn PDF document text
    • https://luminex.pl/upload/file/mesipabemidanafeposo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080acbd629d7---28949545840.pdfIn PDF document text
    • https://computerzone.pk/file/84451351654.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf5f6b228---nusupexuminederekojin.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_off0000de7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7C 10896 bytes
SHA-256: 151526b8e0c3a52b0ef6be3dc2b626450c29b258270b2bc17a75e1cc24fb9771
font_01_sfnt_off0000f7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E3 17156 bytes
SHA-256: 602fe60f91b176a74815b7263a6eef6918b712a00ada6a409af32f1ab77a3c09
font_02_sfnt_off00012516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12516 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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