Malicious PDF — malware analysis report

Static analysis result for SHA-256 6080cefe348f2749…

MALICIOUS

PDF

82.8 KB Created: 2021-09-04 07:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 45708231b9371e2df1044b1167be57ed SHA-1: 8b5f8582e7887ed624f0c8e54b2afa100ed0936c SHA-256: 6080cefe348f27493e3ba97045e2afac71d76817de73524b281dd13606452fae
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://www.bufolari.com/public/immagini/file/36734490662.pdf In PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607139d32367b---bivikogukasirasevefire.pdfIn PDF document text
    • http://abworder.com/uploads/files/xukomedenoboxurisikudusuf.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d68b74084---luzufupaj.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/17370402000.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/90fce76a59c207cd69ed58d5a977f8f7/buwasudakodigi.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/bitenapenuluk.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/b7580a93e85a3e8bc9bcdf4938bff9b3/7458934617.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/1f2d18a45f15d2a4546cdaed306a986f/mevabura.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/73698135418.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/fbd798920fdebab67605c3cfed659095/xafukaf.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/vubito.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/43956122408.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/33785dbdb6dd54e853f494e7d89f4d60/woxalidif.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/mifaloxisowo.pdfIn PDF document text
    • https://palet-school.com/files/files/tobepekulukoluz.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c115901f0d753e106139f9457d41b2fb/roguguzevegirevudekasot.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/debanujebefatakokuvaso.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/minukit.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080faa188584---64270280611.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210828021845530.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/69021993478.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=2014+cadillac+elr+owners+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_off0000d9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D6 19996 bytes
SHA-256: 693b397b7d0dbbb360c2711d142e4313e93ee7127ee75d336e3d45d0451ebeba
font_01_sfnt_off00010c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C33 10892 bytes
SHA-256: 15fb99335ecd9dc2f46085347adb44cc127d72ccd9909c16b0f3f4970b9e9072
font_02_sfnt_off0001258f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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