Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcda6c0ae6d1f942…

MALICIOUS

PDF

82.9 KB Created: 2021-09-14 08:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1f75ec6b0f1426d15b622f8ba16da6df SHA-1: 84aa21d37a7c78f3f0df80cd1121c997ad3c99e2 SHA-256: fcda6c0ae6d1f942bec1071a1f49e25afd03671b655858703ffe2aa2fa1326a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for information. No scripts were extracted, but the presence of numerous external links indicates a primary function of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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=veer+zaara+full+movie+live+streaming PDF link annotation
    • https://a2designbg.com/userfiles/file/30580979705.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/wenekefagukadozexevinew.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eaf6f43406---47615998825.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/98730611079.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/tapadukawulij.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/57182351089.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/67700427547.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109081848375575.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/93123541024.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/nomezew.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4e741832ce89adf4ae54e40f6dbb7cb1/69989979042.pdfIn PDF document text
    • https://steammining.com/userfiles/file/94411177714.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357a8af383f---nodiruxebifafolumim.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/26827794082.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/d78e90bafe4f3e5c7b2a612e46cdcf38/semudub.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/61913261262.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137e76fddaff---86526892806.pdfIn PDF document text
    • https://olterus.info/contents/files/69476684666.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16132f354d98a1---86445776699.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7e4bcf486---wokubebamoriniwivat.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/jikojuponemaga.pdfIn PDF document text
    • http://alles-vom-schreiner.de/userfiles/file/10675148115.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/tifure.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_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 10752 bytes
SHA-256: ce793e029388e90c8439858827c6d06719bb4deee88f3fb2e65f57f32e6f2de6
font_01_sfnt_off0000f89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AC 17476 bytes
SHA-256: 86e292948f6d8dbff7b7e760bcf4c586fb44140322d5bab937cd04313bf0577f

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