Malicious PDF — malware analysis report

Static analysis result for SHA-256 019c6c3dba5a21a4…

MALICIOUS

PDF

74.5 KB Created: 2021-08-04 02:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 668c56cfd56fc70f311ee2704b5ca6f7 SHA-1: ebfe69730a6d832234db8615ca9e1424a3227c61 SHA-256: 019c6c3dba5a21a47d91b62ef616e788eac6ee035f3e8c04ef8b6ce8f4ba41ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially malicious or unknown domains, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://himarco.ir/basefile/himarcoir/files/81417358143.pdf In PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/a849d132ad7cbcf7acb7db577015be36/lofamerefimiferaz.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/bevipozilelulotajelaxofat.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kixigimulebema.pdfIn PDF document text
    • http://turnyras.lt/Files/file/47998594379.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/zixezetilefigenufar.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/xadujosoveduwogal.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/39583416557.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/pifovikebuwive.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/zezilonoraxutal.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/59677848831.pdfIn PDF document text
    • http://aroma--style.net/files/files/gowowiferabafufego.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/pimisunuvik.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/35386813268.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/93233233047.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/mulerudelulerofukefipunaf.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f88d26a329---newefa.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/riwuwapulixexevez.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/62432282142.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/sagire.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/lofaratebibikumirazumogob.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/69350084216.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=manual+aire+acondicionado+philco+splitPDF 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_off0000bd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD20 10704 bytes
SHA-256: 440a1834ec6645294b15f05bdcee1103520325fd1f9d13a5215e1311a2c2bae4
font_01_sfnt_off0000d595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 18236 bytes
SHA-256: f820de7172865b04c4f28b8fc8461969c254d5a1a2ac8135395e11b6df6fe20f

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