Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00590053d685609…

MALICIOUS

PDF

74.7 KB Created: 2021-09-06 13:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6b977e386074f55d28312f0d007c42ad SHA-1: b2c330df3b922f6fa7ed79ca57c714b75bb3713f SHA-256: c00590053d6856096a30c644c372590d042e844d0157758941be0a7b8749c9f0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Several heuristics indicate the document is part of a link farm hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b9187b479---nadolurolezokoketidivi.pdf In PDF document text
    • http://smartpaintingplus.com/userfiles/files/96858881813.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/e45fsf053n83e9dn3qfp71c29n/petewerefavas.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/zedamoluresinesenumasami.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/64ee3511141b53f956f25020ec8cb7d2/67238485345.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/e59b0e1da365daee89ac36d7dbc2d4b3/61697001457.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/b8e211284e79f2366c5dd4f24a2e5aac/98830354700.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba51a990e8f---dinikukirufawurizutel.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021062914131033.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/de1b4a85d52685296c5c86c3dfc12cdf/50918062427.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/nerewaj.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/mutuxumiriwiwuzi.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607596989f370---99150557916.pdfIn PDF document text
    • http://hzbmsj.com/images/upload/File/27162286645.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/94095024955.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/15408771967.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/wiviwarobizux.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16218280141217155102.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/pitepizixemibudi.pdfIn PDF document text
    • https://vientangluc.com/upload/files/63758570853.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/49346233948.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/92775953090.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/16413505219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=dometic+refrigerator+service+manualPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F5 16664 bytes
SHA-256: d06bc83c51cc098ff7a4b6de59e25828ec6bc179a5d93ee99ffe9563a991aea5
font_01_sfnt_off0000ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 10848 bytes
SHA-256: 1dd979219c21784196ab611f65a028babe3d4f3e8f35006ebc83fd71e7ba8cbf
font_02_sfnt_off0001051c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1