Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ffa5a94e64eb098…

MALICIOUS

PDF

83.8 KB Created: 2021-06-29 14:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f094bdde64e99f6c49c2ba73ef52ee99 SHA-1: f7f958f28070010d6e8b83f7da95d91c7b1f22e5 SHA-256: 5ffa5a94e64eb098a5629939184520f7141c0f4fb4cdbc9030367b7b5e0595d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or lead to phishing sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a likely attempt to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b79f1519e---17329542823.pdf In PDF document text
    • http://af.ssla.ru/images/fornews/files/kupogofakafaxini.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/24b5e5e55a5efb92596ca312116d23bc/bixoselex.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e0cedbc2f17ce68a8612a5b9c400791b/16066928589.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d010da56ce---83531631481.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609840c9a2daf---26164754593.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/vogejagavavagifawupevuk.pdfIn PDF document text
    • http://houselandia.ru/files/gajisikev.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607802e90d84e---zovaxojebenejugewapo.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021062408584573499.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/51320423701.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/ld0mpcl2938arrkcdhe7jnn912/79367816940.pdfIn PDF document text
    • http://temple.mo/userfiles/file/minoluxelodaror.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85046980616.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/neduxajorokivov.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/9315193378.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608377ae921d4---ruzimapufaluxuwevuvonit.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/50190393686.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/miwemazezotogavamapedur.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/53950209008.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=high+pulse+rate+causePDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/26ef090cc60d44ebe68f81dd88c3c81d/23690701773.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

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_off0000e545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE545 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5C 10520 bytes
SHA-256: db5691e3ce3ac84171413f705d56d1dc695d1537ceaa8d47ee869f61a4d5ec9a
font_02_sfnt_off0001156a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156A 17156 bytes
SHA-256: 8d9e6db274f8bba0ef99ee68e75a7dd0b92a0bdd5f6b6d35b926db29b4ac103f

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