Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01f0c30c619ab52…

MALICIOUS

PDF

82.5 KB Created: 2021-08-04 15:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9a4bd370b7d7a3edc4d9232016175bcd SHA-1: 36fd02ba5fdb76affaaaa209ebaeddf063286092 SHA-256: d01f0c30c619ab52b2cce233939aa763352f6d7686f992389cf6991a29cb4286
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the PDF structure indicate an attempt to exploit users via malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/afasnk6k52845sj9qbpacdd63n/23106954802.pdf In PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/9fc8ab709620cd8beef26f2bea52b43f/gisiteratenirobog.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/2791e8fae3ce6aa5c486c213a185eaec/tupijixazowora.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/38lsfs6gb5v2d9oaq4uu964f14/xijojuwapebap.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743da716679---lixatawumebuvu.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/vjlo4r95comgku4qub6obu8et7/depitaturod.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/pijobelo.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/c18cd6e6db13607610a77eeccc089cb7/kekug.pdfIn PDF document text
    • http://gyobel.itpublic/file/4159656400.pdfIn PDF document text
    • https://cargotavio.ru/files/file/93878243687.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbbfd9f462---jediviwumamosom.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/38f96t2ptti5kh3l35qi2c2sn7/22626390282.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6ffd85ddf0---40039352403.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/lenifurojetevepatavevek.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/fopaj.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c86ac118f53---75099523524.pdfIn PDF document text
    • https://kham.vn/userfiles/file/luxakafoxul.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/36295649599.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/90087745338.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/4244505977.pdfIn PDF document text
    • http://santabruna.cl/upload/file/23808481018.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3d4270b8f---kixewulokakibodibi.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/59555205439.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/dujejavaseg.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/33294947947.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d08ff72f37---munivagazowibis.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/893f97b09858e475bec7c74020262127/xenitenonoravaxijitisi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=techno+gears+marble+mania+avalanche+instructions+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E9 16508 bytes
SHA-256: 84159a2c6a826f698f5956e2dc2f79faa6c3db00e2cdc392aa881a69e7aeedbd
font_01_sfnt_off0000f2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 16224 bytes
SHA-256: dc06733fb1b3e8baa4303a7b234726769048d67753183ec25fed266cd0fe6b8d
font_02_sfnt_off00010890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10890 11336 bytes
SHA-256: 425315ccca716d8596d9dcadaacc010be1306db78c15342502cda5940f305fe1
font_03_sfnt_off000122a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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