Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b40d7484fccbcd…

MALICIOUS

PDF

83.3 KB Created: 2021-07-20 12:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bac61d85807217c6c44d331e08d2d432 SHA-1: 457986ad4994d7a81f92e7e51ff3255b8e1d598d SHA-256: d6b40d7484fccbcd5952344eb231dee48bef9d6495a76a79e1d0b6ac168bc792
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress installations and disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with the characteristics of a malicious PDF used in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/612e6e381b383d2e7c13002915f5b532/lojuxemaderepiw.pdf In PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a374335726e---69044920187.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/0noh926bn79c5i0v22pmjm88ph/vituperuxulagevev.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/5642q429hom487kbmmuel1gfm8/nikidisemaxetugowabedi.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a8af7ab4c---76754449722.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/vumawegivavewatemus.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/28137424954.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/zepexedudaxekome.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/26067906797.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/80526785331.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d03931867dc---48804796877.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/gideneresofaligegubijat.pdfIn PDF document text
    • http://lucavolpicella.it/userfiles/files/34040640057.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/a5e7ea29056b36d9bfa9d97caf732b32/zevotibejajejidepoji.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/22071512473.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/6cb85a089013de03207f5945fffaa511/vufipumusu.pdfIn PDF document text
    • http://soflcops.com/clients/83267/File/63841016605.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/33292684489.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/2ad0eec82e8d5ffa5b7abe02ac67dff9/fedemelegoxi.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/lejogepanotugeguvu.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77a3fe3e23---gutale.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/cde8a35d1a3638c29182eabb1760ccd3/66859017588.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/bizevetu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=we+did+it+start+the+firePDF 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_off0000e6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C4 10176 bytes
SHA-256: 0ab45e481ca1293723cb4fa1e962b5570bbc5eed65a8869130eec35d9a6c3056
font_01_sfnt_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 16384 bytes
SHA-256: e43196ed9f1c6393a2f33d75b390c1a774cdf11f59d2be39bedaea0279fd99f6
font_02_sfnt_off000127fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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