Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee35e58aa4b0c08…

MALICIOUS

PDF

120.0 KB Created: 2021-08-02 17:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 342893c790e80a7e0ce47bc43c9d5f19 SHA-1: 600019d34b28b70202d32e198e66b15b4af1b001 SHA-256: 0ee35e58aa4b0c08cfbb5fb5aeb5738b706363ba6f1dbf9ada6372c9449ccd14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on potentially untrusted hosting, suggesting an attempt to direct users to malicious content. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://allytemp.ru/uplcv?utm_term=what+does+400+mean+in+hebrew+gematria PDF link annotation
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/44989292536.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/70296453613.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087e50d1821b---33793509902.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/pagopegikexi.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/popoko.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/ratunakufufedata.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608afb7e6dfeb---panovugikolatez.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/nebusevetovuw.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c7ed8287f---54722508104.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f37c9741719---80535908682.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160871e0368e39---73472675675.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/pufatedonopus.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b23562d0---naloxexo.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/17439002848.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/54533945152.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b035be8c5---vusokefuvovupujefisaruj.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/novofu.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed06ce881f---54097680922.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/sajuzuwiku.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/37840394022.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/ufi9nsgih894ol2f5mvlkup782/wimadelumedowibiposujevaf.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f6eed499e---19375477989.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/4e1f3f8e399cbe0b757dc6d07be9ab5f/tuganemikofifamigun.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000147b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B0 19312 bytes
SHA-256: 8842bfbdf952ff2712819c72c5a21bd590b9c67dae2e12e781d3cb860a8fa349
font_01_sfnt_off00016829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16829 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18040 11068 bytes
SHA-256: 41d014f87fbc18711d7215b531f21c3852fe812896195a7aa852e3536c75361e
font_03_sfnt_off000199b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199B5 20892 bytes
SHA-256: b14f5619298a54b15e4a15dfa428010187d0270452bc9cf5364884b55fa6bbed

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