Malicious PDF — malware analysis report

Static analysis result for SHA-256 494ce02ea6eb699c…

MALICIOUS

PDF

85.9 KB Created: 2021-07-31 13:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 34095fe5fdafc66c1e351ced49ce88cf SHA-1: 2e0999f5774b468c4a6e43fa7873fc7c35c9fcda SHA-256: 494ce02ea6eb699cf1f66882ab7e0f112324de573da11166091bb4972b79b76d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites, with multiple URLs pointing to other PDF files. The presence of external URIs and the nature of the hosting suggest it's part of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073a39c0c15d---kuduxon.pdf In PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db6ac063fc7---tipotunivibofifisuxumok.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/544524059.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c30bf991ed---51035461950.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609137fe99e9d---badusa.pdfIn PDF document text
    • https://vieclamkinhdoanh247.com/upload/files/33502539093.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/8e8917e6605bef5a373fb1e27152fc78/69881631434.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e4a6e79c9863cbe5b0fd99697d0c2e28/98831492697.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/54341810483.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/93964823112.pdfIn PDF document text
    • http://noahjohnsonsark.com/clients/e/ef/ef24418f2336b9480f3353ee42fa3f58/File/rigojot.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ifaeav95qocfhl3bbkc04ec9jm/zovefaziwikapiragorej.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/41480430703.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/zujakabuvasizojo.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/nevuja.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/tosozikitojinalozadetaz.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/57040251292.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/jojozisonifuduxenixo.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/fuxejodakutejupulalovij.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/tetevorep.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/59891364260.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/456936dd8a5a4073c24b1d7e49e9c99f/25947591604.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/pujegebogenoxuvogavote.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/o6sedm4dnhcm1nff64jjnffndp/38538975816.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/nakirebejolejoto.pdfIn PDF document text
    • http://www.asslar.de/downloads/kupimekefodej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=blyss+radiant+glass+panel+heater+instructionsPDF 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_off0000e95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001016e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 17448 bytes
SHA-256: 6c6aaff8a211d2c02f6679965735a8f0e9fabda284c347510b0234acb9fb4044
font_02_sfnt_off00012eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFF 11060 bytes
SHA-256: 9ef0cfa37e835314978d3c8cae7a4678dece9c39b689978fa376d1897d3fc719

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