Malicious PDF — malware analysis report

Static analysis result for SHA-256 593b04218a0e7864…

MALICIOUS

PDF

88.1 KB Created: 2021-07-01 00:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 759ee5a26c996a0a7b0981bb0b4ee2ee SHA-1: 64a1b61a568e03b2dbb2291b330a7098b6a27621 SHA-256: 593b04218a0e7864d1eda108e89c2b700e45099d15a21db3826bbbc5a0795a87
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, directing users to numerous compromised websites and disposable hosting domains, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://huntic.ru/uplcv?utm_term=the+hunter+call+of+the+wild+red+deer PDF link annotation
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/3f87c54bd0c0650c7697ac50d40fc06c/taxexubebexe.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/zemumozoparirogafipafam.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/wozesonop.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/8g2tpf69n5e5tvccqnu01j2aes/madidatadogumoni.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1893d7068---rarezavevijuzu.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/denafigafigupakukegowi.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc4b1742e---77282451401.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/zetifu.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/sanatipotogumikodetu.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5ca900ef6aae092e0006ff93421b6b23/nafuposobugosinuroja.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/fiwiwuxi.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/tafikomomanujaxogoremaf.pdfIn PDF document text
    • https://chp-travel.ir/data/file/2806118347.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/mozupefirireloso.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160796c4694f6a---rikirirowufefebebazabem.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/dupila.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968503ce524---galisijamewo.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/5a73e92c1abf6a292d6294e420b67dc1/9341254720.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/693b2oo6d7tk4v5m562te0bgu1/lenawu.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/4ed1852da1b3070da6c25a9885ce9b8e/32908406334.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fbf0b1864---99567220460.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_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD5 10552 bytes
SHA-256: e035518236c32d7e736f4caf6210e7eba82bbf4ce21a59f6c1a801ebaeeb56d0
font_02_sfnt_off000124dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DC 17756 bytes
SHA-256: 549dbb798960a9d2aff27d69152cb29075a68b91034666d55bbd1edae0183a49

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