Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9074de254ccb4e…

MALICIOUS

PDF

86.9 KB Created: 2021-09-07 08:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e26b01e1f105bd7f4583b63bad92f8d0 SHA-1: c365718440b599e177974c9b6a445ba4b6a3e70c SHA-256: ee9074de254ccb4e95618dd4187c6345032627b28ba43f4f148468401be72d59
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristic firings.

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 http://lovesushiscv.com/uploads/files/dabaxorejisitofulinexom.pdf In PDF document text
    • http://alnoorcity.com/userfiles/file/setinezaxegesajeb.pdfIn PDF document text
    • https://mollis.rs//files/20978519716.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/xuxopekatireveduguwiroro.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/53617282638.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/3546916149.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/busig.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/96460977126.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/1b356731823ca59cffe7cae18140a783/butavutodefurufezi.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/jowisozivegi.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/74044897886.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/67725973390.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3580d8619---vuvexutiwe.pdfIn PDF document text
    • http://rc-modeller.se/images/file///kiwugizi.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/54149582316.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/57739046325.pdfIn PDF document text
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/34144288101.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/41acb1749d39db3b48cef144a1fa3eda/68583830805.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/70943113066.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/46397134382.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/jonamakerazedujumefeta.pdfIn PDF document text
    • http://gorillatheory.com/admin/upload/file/53030329898.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/mojezasagop.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/57099768698.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612b325d77e67---98810985479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=contoh+laporan+studi+kasus+pdfPDF 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_off0000f42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 10684 bytes
SHA-256: 3e3b2686fccd422a72333c03563d1f9a90d843107f29b036715ed10d72902580
font_01_sfnt_off00010c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C92 16056 bytes
SHA-256: a0ace4d5a527b176a09069f78f82e9404060bbe76a69c39956162f48722e7400
font_02_sfnt_off000135e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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