Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e2d66a4ae76c69…

MALICIOUS

PDF

71.4 KB Created: 2021-07-14 02:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2baba9f24fe5ec3932283a9d7e9b19b8 SHA-1: df13444013372ab1f018ef484f546b92151c846e SHA-256: 52e2d66a4ae76c690d9ed49446145b5e3f7b287b7186c686c962941716a162c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the links and the PDF structure indicate a likely intent to redirect users to malicious destinations.

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://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/36b1a80515eaf5c6f61abfb1eb494bf5/dilukoseg.pdf In PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/960eea1a66d6cc8c784196082163b62d/55564692236.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb9180edda---kivinotituwuvosagi.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/53657404800.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/82c38dafa4268a8bb64acfcfe2abed57/26318779689.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/61327059446.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/97648651753.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b447e30e2d0---kujezeva.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160846bc8a7fa3---ziketuxozewinutolo.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/5lnujd1ljlipstvqdu4jovtdvh/rorimurowupativogexewenax.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed49b76d87---nusuvenobi.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/n7fg0le8u138siasbnvfqpii21/70315292465.pdfIn PDF document text
    • https://tavio.ru/files/file/vubotatujijekuwi.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/navabineg.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/55882134646.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609839967c459---76117440526.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7e1bbf0c9---15715761544.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/tafatiguzilapejilidas.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bobabugolag.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090285d0b2ec---malifu.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/34372364518.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ebfab5e312820ba592299dddc2a76d5e/zewogefivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=types+of+freight+transportationPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E2 10668 bytes
SHA-256: 185ed79b75e8179b31bc60d057e5de852885b40f37f9e5b77a9e0e5125d03ad4
font_01_sfnt_off0000d259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD259 15020 bytes
SHA-256: 1b73413860b9ec057f07950fc58cb6ea53cf22c4896301fe8acc5dbe5b8bf49f
font_02_sfnt_off0000f88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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