Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3a9feae519dcc3…

MALICIOUS

PDF

79.5 KB Created: 2021-09-04 21:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 02e99a94b10be8ad9073c665e67be22b SHA-1: ac46ab2bb4c9d42f7a83deecf3b682aed91b9f17 SHA-256: 0d3a9feae519dcc332528f50d0ae3425a8c8cb0806ca39006dceee9411539501
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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=ingersoll+rand+air+compressor+model+242+manual PDF link annotation
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/53414558264.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160941dd6c4bd8---lemutotoxizavowifoture.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/loboxab.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/eed636d813152a03d7d1fde6f8019959/polobogifopusugujonokamob.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/92ccecd08cb109e78bf2fc7bb498e51f/95811870226.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161075f4eabe14---rumelob.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/86cf64c639ba80cf4788cbc8213f068d/kagozunumotebiwejubujij.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f954208ac---44463367346.pdfIn PDF document text
    • http://noidiengiaphat.com/upload/files/mudaxodof.pdfIn PDF document text
    • https://magerp.org/upload/files/rupaxo.pdfIn PDF document text
    • https://okazionche.com/files/99140306187.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents//files/84582535976.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/nakozada.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com//ckfinder/userfiles/files/47633291191.pdfIn PDF document text
    • http://amatnieks.lv/pictures/image/kevabidedatovexowugula.pdfIn PDF document text
    • https://wmu24.ru/media/file/46630155571.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/5cc6f12370fc08ab615d7fd88ebb6506/kefunupavabanufuxekorug.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d382cd660e4---pavamitidamusu.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/656c3d50a42a698615f7d00c398f87a8/xuxejawobaxizanabibom.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d19aa20812---64588096332.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/puzatutibetalonokofa.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609be119682f5---kalit.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/97676567769.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/72777754249867a24d9a80e0a804be5f/5176131738.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_off0000d02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02B 17604 bytes
SHA-256: a0b564a9e3aa330e7f0f545e704412f196270d5ad81a12a16a8b25b9022cb3bf
font_01_sfnt_off0000fdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11605 11008 bytes
SHA-256: 502980710db91323832a69919cee593ed89af3f7c7fde688cfdf3a1dfbb1ece4

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