Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3e494b47719910…

MALICIOUS

PDF

83.9 KB Created: 2021-08-14 00:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e20dac74537833724047a0b8f4be4119 SHA-1: aa3c9d4c3d56049a184bb81cea8338994c9bf2d6 SHA-256: 6c3e494b477199109676944e25d2d320af5c116bb1d50bd7580b77c7ec046480
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, 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 distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/wedidategibubuzorutanemel.pdf In PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce9360e7c8---fulijaxadevedeb.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/vosipi.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/buvunuzida.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/sebileduwoloxesi.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/93013827349.pdfIn PDF document text
    • http://wirheiraten.de/images/file/nebadikuxub.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/02eadb55de419b312a2601ab9822c918/samavubojutoti.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/06e57f4e53d3570d70970ab6ff7e61a4/vabutipidaxeraxokadipok.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/59161261395.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/fukisi.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcff880d27---42818544671.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b897d5a1bc2---mamiberugogu.pdfIn PDF document text
    • https://tisuputih.com/contents//files/30802497547.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/oe9k5l8mooniehh6h81tnimn0c/lulilulimonof.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31a9b8178d---73447575000.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/25984420568.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/fuwuvogebizovisinovube.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ce8b7154a---558061249.pdfIn PDF document text
    • http://licausi.it/userfiles/files/9909688536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=complete+sentences+worksheets+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/ludasepiwobudifof.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_off0000e607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE607 10840 bytes
SHA-256: 3483322b5ef32d76eaa033bdbaddc030802b8d42d0873c7814ac4c2f8cca5f4f
font_01_sfnt_off0000fee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FA 16688 bytes
SHA-256: 08d9b146ecb7a069eb3579a98e9b0cd07246a45c35b165d5e316b8693ea7b0a8

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