Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1715e6c48179dee…

MALICIOUS

PDF

74.8 KB Created: 2021-08-28 08:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 3e5bfaab6c2beba0c26aef28536b10b9 SHA-1: 3295362422ab9e9679a51b24076c515363dccc0b SHA-256: d1715e6c48179deecd9284be193b106a3e3eb3127f59aa3603e080a9eecc7e64
184 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, including one pointing to an IP address and others hosted on compromised WordPress sites. These elements suggest the PDF is designed to exploit vulnerabilities or lure users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078906e53005---60909651558.pdf In PDF document text
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/fewifegipuluzazepowidopul.pdfPDF link annotation
    • http://aliglobshop.com/userfiles/file/73359577127.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/zedoxadasapuvulariwe.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mfrmveh1tml0j58flr34ahihof/keligenuki.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607543d7435ae---vavati.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e226f370ff---80688831425.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/hcotoe9ib5eqp58d9ae8pvrnce/jipomapax.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/filovizejozuramitejatudew.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/54039583171.pdfIn PDF document text
    • http://vo23.ru/upload/file/60049353564.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160f993c6bdc02---zobajesil.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/jafifanoluzufenutizuk.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/81551478942.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/35613141787.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/perobad.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5cfde6e47---zabiruxujusajisuvu.pdfIn PDF document text
    • https://nhuadailoan.vn/upload/userfiles/files/49956654601.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/10056659639.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/vulanelawupubofitovuniri.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/87431739889.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/wabepotakijofasirojikux.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082eb9c0133d---87822010521.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073a8a565761---gumowovesefos.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/39376107465.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/46072478956.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/sezafetusitatap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=identifying+rational+and+irrational+numbers+worksheet+pdfPDF 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_off0000bee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE0 11428 bytes
SHA-256: b1da9fde372140f904ce4f80baa273f793c1c2f33c8b27c75e412ca5dd5d3f97
font_01_sfnt_off0000d94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94B 16720 bytes
SHA-256: 036248baef6b40e7a51877f85e9defaf0dd7430731db8ee795684d4203921ccf
font_02_sfnt_off000104ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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