Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ead2ea7fafe4c3a…

MALICIOUS

PDF

89.5 KB Created: 2021-09-20 19:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1b5c726dbf6ef10500183e1bab07be98 SHA-1: 3e27be93f0a3d319bb4cba0eec48d39fdc5e676d SHA-256: 7ead2ea7fafe4c3a02b5818cc9c3e87ef438f3ecb56b23562e95102d5b50ac4d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, one of which points directly to a raw IP address. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the download or execution of a secondary payload from the IP address, which is a common tactic for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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.
  • 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://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c28d9a9b18---58508538218.pdf In PDF document text
    • http://watthaistuttgart.de/userfiles/file/68172629887.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/75763036699.pdfIn PDF document text
    • http://koutingchina.com/upload/files/vosepejadawigagoxaluxof.pdfIn PDF document text
    • http://kccmaul.com/files/files/80008365479.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/vorisade.pdfPDF link annotation
    • http://niszczeniewaw.pl/userfiles/file/40019867669.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/6697083413.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/62205385619.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/xedefinivukupub.pdfIn PDF document text
    • http://bbmpva.nl/fckassets/file/47228857438.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/47660378006.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/regezamuzevuzisuxaxekiven.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/59513633563.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/29033941997.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/19386839320.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/divakuk.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/bimaruja.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/96551579856.pdfIn PDF document text
    • http://teraval.cz/res/file/zaforevikuraligotod.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/18117556527.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/64249178092.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/piver.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=twilight+princess+rom+wii+uPDF 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_off0000f4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBE 10808 bytes
SHA-256: b8277cfd103b2c240c7f111ac098849fe59c202b794b7cc4ed3d6f1d475e3f76
font_02_sfnt_off0001258b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258B 19372 bytes
SHA-256: f432012b288a3b7f12ba647584cfece25da2b0f9608bf71a64d542d2b2de8c7a