Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb32b2defc07b2a…

MALICIOUS

PDF

69.8 KB Created: 2021-09-26 13:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 89b53a68dd3e4f9588746b9a0aa8016a SHA-1: d6f36f0f8a7fa0bfda8d4374116c4b10395d79f7 SHA-256: 6eb32b2defc07b2a1d56a7846b7859b9f8c96c392f3baf257a7a8f52976b271c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=best+voice+to+text+for+android PDF link annotation
    • https://belretail.by/ckfinder/userfiles/files/zugiliwilab.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/gegipiduwufosifarepomewe.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/80717531349.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/15907973758.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/qm1u7a4ce2gla6il6jn3n3pm93/76495832229.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/65719190400.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/49776894693.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/manawitufizawutimama.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/44719032874.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/varetaxodelemupogixuson.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/vopuzixeworetorama.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/99907002596.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/fqjbf8lgca9f3607l3ued7gqq3/66158941176.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109070847252549.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/fesoragudizugolow.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210917_1E44FB7275C68D07.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/gujudipef.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/80488177596.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/tixifowuvepirejow.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/62173842578.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/66856509832.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/1128695953.pdfIn PDF document text
    • http://muszempilla.com/files/file/48176481561.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_off0000af3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74E 16280 bytes
SHA-256: fe51afd81224e206a1ae277053bec9189790cee4189ae2a6d27f285880577d14
font_02_sfnt_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 10644 bytes
SHA-256: 168f3e35b0f212235e08bed756b3d194c406fb8515e087c5d79b756c151d96b9