Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa67f3a42bf13300…

MALICIOUS

PDF

82.7 KB Created: 2021-09-18 11:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a6a76b348d5d3d5040be2d32ffb1184c SHA-1: 09166eb4fb7ed509998e5124b63aaab05f293f97 SHA-256: fa67f3a42bf133001bebcd1890a33fff852f2be6d6a89eb876c6de4708441556
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The document acts as a link farm, directing users to various websites, some of which host further PDF files, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript indicates potential for client-side exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.fishandcosolicitors.com/uploads/files/kajet.pdf In PDF document text
    • https://highrise.pl/file/wimofixozinewin.pdfIn PDF document text
    • http://getem.eu/files/file/vokapukunijonomesazovolox.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161412e2b96a7c---pixew.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/99987927952.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/nofen.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/61042037154.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/48616950662.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/lafuwizimikiduk.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f4f34414c---zajudanijunexazeduxoguxin.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/zaxokatenevaxinepabu.pdfPDF link annotation
    • https://hobbes-group.com/upload/files/35102485553.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/68928826678.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/16/ponabuxamemiborop.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/fajojavopifilibavev.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/jowuwevuxexu.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/53432582273.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/nopikezugodiwavegitok.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/96570792204.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/73834006216.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/xerisuforo.pdfIn PDF document text
    • http://hasyo.net/files/file/rudazuregegid.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/2486031050.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/36271605404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=horror+game+for+androidPDF 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_off0000e2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D5 10376 bytes
SHA-256: 6e4e7afcfa07ff432fffe031b98fcc2f48669a2a1793f7add708c1350abd37c2
font_01_sfnt_off0000f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 16732 bytes
SHA-256: 92a6ffc00992f72e327436c29892232d1443f2f8466730e7da7ac53cde76d41d
font_02_sfnt_off0001251b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1