Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ebaa92fb4161eb…

MALICIOUS

PDF

110.5 KB Created: 2021-07-03 20:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 801ad4a794b5eed00c4a214e1f2bff50 SHA-1: ba94c444f9d6ab82a1000901953b110734ecc3eb SHA-256: 62ebaa92fb4161eb90fe875e91cf016a501a7747e04a8add93780a70122fa96b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

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://laborke.ru/uplcv?utm_term=different+types+of+speech+delivery PDF link annotation
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9cddc4dce---29406236156.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bbcf06dcf---sudowokepilek.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/eo3t51ok8dac76ff9cdjairvjg/97528551008.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef7c46bb5e---satetadofupugubo.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/fogivokeguwet.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/24016609080.pdfIn PDF document text
    • http://wahibluedevils76.com/clients/5/55/55d7338a7abcce318bc847d7f34994f5/File/23872444172.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/gajinezopujaluxosedateno.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/baponawupadu.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a59daa2d77f---41910211785.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071702d7729d---jewofoxufafowuzofig.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/u824askfale0ul0v4ufssgb18o/vugabenuwowisabenuside.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0e4a151f8---vitixezufolub.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/47353664654.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/61717280065.pdfIn PDF document text
    • https://principesgs.com/userfiles/file/doveke.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/799ekp0e9u7591qeuhvl00s33g/lolekejomuretodif.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/6e461d638563c2d3c694baaa9ab63c95/92956017785.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/ce9afefec8f3acc43376a6c8380eef91/nakumu.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/36046127665.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b71c6ab1de---62781554179.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082229913cf5---89483062262.pdfIn PDF document text
    • http://attlas.center/userfiles/file/kojigadijafijovod.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1b086cd59---mabifo.pdfIn PDF document text
    • http://d4scanada.com/clients/8/81/81a8d3ecf29e0a7d9042e8364394d873/File/37041431521.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac20a31e832---mepelugizuxelitokigafu.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_off00014dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD0 10736 bytes
SHA-256: 453d376cecc2c46109241b1eb40231a477bd3a4e96d4ecc98a828f152a63e83d
font_01_sfnt_off0001666f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1666F 17596 bytes
SHA-256: 2c265c6fd3d78e7b6de188c9a6ba09b221a76f9ec05653762dd39ff4d6954419
font_02_sfnt_off00019449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19449 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1