Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce57164e9802c8a0…

MALICIOUS

PDF

91.0 KB Created: 2021-08-13 11:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 604705a1ca4040c964914e2eb52f4202 SHA-1: ee23c3b107cf3343336d45faa618c7ad8975f2c4 SHA-256: ce57164e9802c8a034ee5c22db759a7dc0197108c4ccfc00d826d62dba5d2bf5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong intent to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crewmak.ru/uplcv?utm_term=t%C3%BCrk%C3%A7e+dublaj+western+filmleri+izle PDF link annotation
    • https://bbmint.com/userfiles/file/voduworaletevazuzopevetam.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/82191897812.pdfIn PDF document text
    • http://ridendo.cz/files/file/58757679136.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825cf7c7b10---14185655758.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608be7f36fcd5---jupasajeziduvagezonadu.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/mefiz.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/96029142570.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/26275977530.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/c9a41d66bd6152bb034ae82bdb4ccd3d/potoniretunolenijugumo.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17859dbf8---dupatadak.pdfIn PDF document text
    • https://people11people.gr/uploads/File/19243207656.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/beff76d7659ad4c8f606f5d82f02356b/xelapozinip.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/29829681596.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/61491549730.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a09baa1ffe---63155068553.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/kiwomugefawafojexoxole.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/39332939085.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/45660404137.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210627034247_eg92os.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bd411f6a8---33356410236.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/d81a41b801956ff8a48dad89aad7be14/xeliluli.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/falevakedexusavawimiguzar.pdfIn PDF document text
    • http://ithaca1961.com/clients/875375/File/jefanukubiru.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608b758ced54d---25326063383.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/86506769970.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_off0000f58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58E 21352 bytes
SHA-256: 0c03003d5ff5cb38de6466ab30e0c7f83ad8d9089e423ecd20a266cf8d3d4d92
font_01_sfnt_off0001291b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291B 11356 bytes
SHA-256: 2343d033a782e74ac996b534fc8806b5731ddb7a4258dfdc2ab36e66782f272b
font_02_sfnt_off0001439c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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