Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca317a04ff2426c…

MALICIOUS

PDF

84.0 KB Created: 2021-09-04 15:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d0acd722c204eaf661371589a8a8d3fc SHA-1: ecac0f94a9838545f14353e34b659b23580b3e82 SHA-256: 2ca317a04ff2426c80eb331ceb13a8544738347971a6aaa9969bfff451ef1996
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The document contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or SEO manipulation tactic. No scripts were extracted, but the overall structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=abbyy+fine+reader+pdf+to+word PDF link annotation
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/lezuxijesefapiduledadoki.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/cfbb6f7421bba1b042fb8fdedd99f227/zorodorusabuzenakoro.pdfIn PDF document text
    • http://muszempilla.com/files/file/32860252916.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/39794394392.pdfIn PDF document text
    • http://vieclamketoan365.com/upload/files/23420069719.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/d6e11cae3921c481394542c7b74504cf/vetemeneda.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfdd13bdd1---25064722703.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/pawebukuroxupibezetetep.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/31ad07bddba7bf8b7e79487cba02a50a/68670927755.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/fedakelefasepipupu.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/81693477304.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/vesawefuwigedasoduripekab.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/govabivimunalodusop.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606de8164d0ca---saworuwivufiluwaw.pdfIn PDF document text
    • http://kme-kme.cz/files/file/toteb.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/43193593569.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/f85398c5472084f948242b2d095b7832/nafanurowovuwebabimeza.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/36529101370.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/begojotovoz.pdfIn PDF document text
    • https://castel.ro/userfiles/file/497212258.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/b9f8f6ce13a08da4e58332f2e868166d/tezanuguradimizi.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/gafokodulovomiwujotukipew.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/kajolelarelivigunupizego.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/99824714560.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202107/file/210725210840060347f7v6w42ffbg3.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_off0000dd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 10600 bytes
SHA-256: a8608335529f46c41e8dcdf34e6bb7506fa51127fe13126ed517eb3e30ba3851
font_02_sfnt_off00010dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAC 20464 bytes
SHA-256: c5427fd573239bc532773b1cfa51865fb0103b2e7b6831b58b5e5791c5ee0bf9

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