Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e3f48cc22682ee…

MALICIOUS

PDF

82.9 KB Created: 2021-09-15 22:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 696d0783d552f664ffb61780b05e2681 SHA-1: c749e237571e1b1ade68294b16284266492a6f57 SHA-256: f0e3f48cc22682ee325c83c20f6eb7b6cbc333fee5bf9aa3c6618a5976e1a304
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and other disposable hosting. These links likely serve as lures for phishing or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/wibujanimukujojiwomupixu.pdf In PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b515dc1eb0---zagufekamilelirawufov.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/laxisevomevufujomipigab.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1f7340944---76293851087.pdfIn PDF document text
    • http://hausdergesundheit.net/userfiles/files/83688678662.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/gedegizusifufafo.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/5c48a02a72f5dd506171072b67bb5c46/megobenamevonusegez.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/78283909192.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/vuxaronirijow.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/66016758184.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/77092653416.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5149a2e66---dowumowigisulepup.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/zijuveminefabida.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/59986028882.pdfIn PDF document text
    • https://tadimtursu.com/image/files/20387247149.pdfIn PDF document text
    • http://vrakskodamnetice.cz/file/raguvirefezulari.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/ddd414f33c1091b0503831ce9f869f2b/69686522991.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/oqblj8duei0lamvjbtr50np0kk/lusatarejeweluxevifivedi.pdfIn PDF document text
    • http://ptk-tent.ru/userfiles/file/zobetefuv.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/42287718672.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/fobib.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161320bdc9c192---kafugepiga.pdfIn PDF document text
    • https://centrumschoolka.pl/photos/file/ziruzavim.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/losopovoxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=jak+nainstalovat+android+na+pcPDF 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_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 10524 bytes
SHA-256: 306959ab997f545481b9c7cb006fd48ca9d3217a942c2282867d996da1e5e28b
font_01_sfnt_off0000f897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF897 17464 bytes
SHA-256: f80a5ee948f24ea545b54a8b39a654d039ad1ac9426de0a2f8cdce0a8229fbf1
font_02_sfnt_off00012558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12558 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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