Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e61af116f7d48f7…

MALICIOUS

PDF

97.5 KB Created: 2021-07-14 02:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cd0692d50fec79504af59d63770af888 SHA-1: cd93a330979892d37c3971c0648d3215558fe567 SHA-256: 5e61af116f7d48f7c02a9c1efc9fc9630ee6ffffa4fc9b8c9a8bee7fb5e58ad9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress uploads or disposable hosting. The embedded JavaScript likely facilitates the redirection or further malicious activity. The primary purpose appears to be a link farm designed to phish users or lead them to malicious content, as indicated by the 'Phishing.Trojan' ClamAV detection and the ML classifier's high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • 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.
  • 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://amblamy.ee/upload/file/farozu.pdf In PDF document text
    • http://rhondachem.com/d/files/89835573962.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608176b1a41c2---25860631419.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/fh6nksegdjp3lmsbumdrc14vg0/90128450356.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/96523862867.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/59269142451.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/tjkr9tnqp8pgudtv6c23if0lc5/pefotilusokujov.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/jjg6pb5cf7tnkedismn91ptob4/jirofovuzijaluwiwofop.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/68269591119.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d8828c9b0---jisasovalaliwuwu.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/53112921686.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-7-13/20210713114247907185.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080ecf657807---41665037880.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab77aef1dd---66233462892.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/mozomoti.pdfIn PDF document text
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/wogeni.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95974692191.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/21ef3647bd5179f88c92f2c85da8eb37/dilozajo.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/dcsl2lehogfr0o3kkqt95latno/80440489575.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a2ad8b7dd---98782666472.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/84851685902.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/b451f7d623e6e88997624de38d39aae1/pumekoramolo.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/vijipanivekovetuw.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/tufozodo.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/xivapekidexozox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=woods+timer+50016+instruction+manualPDF 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_off00011862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11862 17568 bytes
SHA-256: 42bd868a16bee17551ba199ee2398169bae3c05a38aed1f156eaf3d3bbf0385d
font_01_sfnt_off0001468d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1468D 11100 bytes
SHA-256: 33206c0daa23ef387ea0ab0a874131eaba0f74033298b86583d662b625305b8b
font_02_sfnt_off0001607c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1607C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1