Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d485a0a623e7060…

MALICIOUS

PDF

75.1 KB Created: 2021-09-02 15:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0970b9977b5ccbc9aefc9f3baf206685 SHA-1: f625639b49c7b4ec2ced187b6860931da2e40daf SHA-256: 3d485a0a623e7060415ee968189668a0c70655a8f2fc23b90f9b2ea631f89470
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure by masquerading as a FIFA World Cup schedule. It employs a link farm strategy, directing users through multiple compromised websites, many of which are hosted on disposable domains or utilize WordPress upload vulnerabilities. The primary intent appears to be the delivery of further malicious content, as indicated by the numerous external URLs pointing to PDF files hosted on compromised or suspicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://nomylo.ru/uplcv?utm_term=fifa+world+cup+2018+schedule+pdf+download+pacific+time PDF link annotation
    • https://norservis.cz/files/files/25761933000.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef217becfa---nesanapotago.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/84559584921.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/4avec9vso8g6d5i6h454dkak30/mugosisuvupiburaperibaja.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/gofojar.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd62765796---rivukadesujewexalim.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/9uim2oeibevd79cd16u954nm50/88294104422.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcba71228d---88225924917.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba93eb14b---66258613072.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210722125037.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/27588738168.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/99916468988.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/savebi.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074dbbbd2ed5---77646761777.pdfIn PDF document text
    • https://liffeyartefacts.com/fckimagefile/file/jeposetaxanezitefofuba.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/3949897555.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/87213663286.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fad68df34---balivanabuwozetinipozo.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021050305483016.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/27fo63c0okopqel8qasun7rnbr/70456221495.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/dutirirefekupejizoza.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/44684458080.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD608 11552 bytes
SHA-256: 663dddc38a402be0991bf09642e9602a522126c8ea61253353b204baca9d2b15
font_02_sfnt_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 17552 bytes
SHA-256: 82732d87a52ea62b19bcc2552521549fbe491549308089510e738347c6054750

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