Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec068048bb13f02…

MALICIOUS

PDF

84.9 KB Created: 2021-09-18 07:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9e8ece43464cd83e47d07feb9ec0ed6f SHA-1: 9f8947dd2b73ef7552467860c0708685e1ebfddd SHA-256: bec068048bb13f0217375ed4167bc3d32a663bb168c08531157c2e29de4489d3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to external sites disguised as legitimate files. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a large number of links on disposable hosting, a common tactic for phishing or distributing malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://muacash.com/webroot/img/files/60019967667.pdf In PDF document text
    • http://market-oborudovanie.ru/upload/file/sesuraxete.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/68109324409.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/30880647446.pdfIn PDF document text
    • http://gaudi.tw/upload/files/16428615055.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/fuzogelijujatiwaxot.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/47795611719.pdfIn PDF document text
    • http://realestatespoznan.com/uploads/junipesokinipukuxanoguwev.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/wafunitova.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/jebeveb.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/52123865540.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109010835319945.pdfIn PDF document text
    • http://freestyler.cz/img/file/buleferulalekewama.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161329c59490c9---9617482216.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/petalajozegunat.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/b4t55phdgnjnq8njn1e3c9v23h/37760803214.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/58062860511.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/vuvifat.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/xosinaxolubofujifi.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/bisubonesewaja.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/69278299249.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/mitogukupefufenudaxofa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=startimes+android+appPDF 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_off0000e6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F1 18056 bytes
SHA-256: abb53bf03729d351e510d06e2f748524c282d24c62d6132a7b909d5c1e430a71
font_01_sfnt_off000115d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DED 10584 bytes
SHA-256: 0950fd6fda42aba964aeaf1c8717f1b54584db5804690c01ad2619e17fcd1b76