Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c674499b6522f58…

MALICIOUS

PDF

85.9 KB Created: 2021-07-19 19:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b3f9f5caa219b693ff0170b427d66b4 SHA-1: 30bf69d79e8a25ac03522e80370c6cce26195777 SHA-256: 1c674499b6522f58c8730067359d9f02487d62db33b575a28baa3cf0d3247af8
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to download and execute malicious payloads. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to trick users into performing an action, likely related to payment or an invoice. Multiple URLs point to compromised WordPress installations, suggesting a distribution mechanism for malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/0vsvmoe5pcd98tchfu1omlr8a4/50516682504.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607545e783a57---24375560696.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769faa803d0---gexenidapuziluguwubenuvuf.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bacec6f2ca---pajat.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd61c464cd---36898186998.pdf
    • http://ideas4mypool.com/userfiles/file/70508101264.pdf
    • http://marinda.ru/pics/images/file/velokog.pdf
    • https://securityguardsupply.org/php/uploads/file/xanuxinezikapaliwag.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/s63366uokinampade3p39aqb3h/vidanedipozogazo.pdf
    • http://howsonfamilyreunion.com/clients/5/57/57b8fe7d350e782a16e6afc8bdcd6467/File/ratefakenojomasowobujow.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071e1214a759---lomexovumupa.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/crltfi1g49q3tchg81503as59a/59628897197.pdf
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/71340140354.pdf
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/67021787831.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/sst6rnup0opt7rl74litco00bv/33521389826.pdf
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/54941145563.pdf
    • http://nhactheducthammy.com/upload/files/15706531624.pdf
    • https://thisissati.com/userfiles/files/vumefatigobuvanuxo.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607348a579932---kidebabidamitegonit.pdf
    • http://zuche0551.com/upload/file/27862762515.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e19f72c472---daxujezura.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/sbr8vorl4vdh7a1gjthbq75kd1/lovidatufotudu.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1e9ea0d7e---42929103301.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=which+to+choose
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f04d.bin
ef0b92d31e51f3903921d5a06e552465804cada67298946135665911261d613f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 9908 bytes
font_01_sfnt_off0001065e.bin
1c5b2a5bfeb807e27d873f49ab160ac85c4352769a9014fd6c769c2ac8964403
pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 16920 bytes
font_02_sfnt_off000132ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132AD 16792 bytes