Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ebcc14e110711b…

MALICIOUS

PDF

81.4 KB Created: 2021-09-02 09:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d06975cf77e15719360f974467ccb57d SHA-1: 3c30bd3db75b0f5568ff09c95dbc2141b10328f8 SHA-256: 55ebcc14e110711b9480ca2ff10a0d3476ec9f3907caa4a09c80dcbc23fb9fe8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous links to external PDFs hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_INVOICE_LURE' further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/5bd10dd6ade97fe76e166e564affc3d6/vapuvula.pdf In PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/d395287d540f11f34eb688a0c67cb9fd/1148130604.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160abb82659a73---gejir.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/1164507592.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607603bca8ca8---87262596147.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nq3hfe7umj3bah4r4b66hmf9q7/66432273300.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/59122035067.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/bazusanifukopubivujirideb.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/gigejesidibamomamajutek.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/70249161146.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/mevawifule.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/sm8r5masmctfi30lh8vep3nrmf/sanabu.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16100e3712e73b---wedidupelemazano.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/32864966618.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16090af2a24e4a---melis.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a58d680b914---faxaxamedikit.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/zedipalevabasojugezi.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/renll3cu7imv0ofhpmmmn3kb31/juxitelidot.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/e10c4bf9682ea61c0be61315d03fb8c6/78623306405.pdfIn PDF document text
    • https://aneri12.eu/res/file/zivegukixokawovimi.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/ts9eq73nheurfn8603v4gk6jfm/3586157516.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/61925917520.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/pofejumilalut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=what+is+the+change+from+a+solid+to+a+liquidPDF 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_off0000da7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7D 11164 bytes
SHA-256: 571d2caa8bf11a56b073298649c8c443f0aebe2b7ee01c7bc46fb221bd2a36e6
font_01_sfnt_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 16716 bytes
SHA-256: e9bfbb393e8452a19b1372c926e1f12873b43d6234b0b1324b3fcd18ec683a77
font_02_sfnt_off00011f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.