Malicious PDF — malware analysis report

Static analysis result for SHA-256 efad96df549954f4…

MALICIOUS

PDF

94.6 KB Created: 2021-07-02 15:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d379c3214ef4ccbc03c2552854c38351 SHA-1: f75ca16b18daa23acfc11e1b08b0acfe38e2286c SHA-256: efad96df549954f4322137b6294f2c1e0af8ad49e4fed8495da37254cedac24c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs pointing to compromised websites, suggesting it is part of a phishing or malware distribution campaign. The presence of external URI links and link farm indicators points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://allytemp.ru/uplcv?utm_term=homemade+lady+fingers PDF link annotation
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160729e22a1f47---pirutopibapegasupurerof.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/07b7fc0a8301d9f256759caa4240f43c/93362851205.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/baf7c6492bbc5675a67d8ef0b5c90cc7/bibalezobibarugub.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fc550a6lemlmpo8c07foj49i0h/27011974757.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160d205fa5dcd8---87794226162.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/8b068abd27779c5a645cff98337f4fa8/51840187155.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/fhai8egihnj6u0kt816064ra35/64030155010.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4f8859d02---xebegiradulododenefiso.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/pak21pmmdokofqfodmmuk3pdfno7h9ik/wujokisokawubeguxefut.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/20981317921.pdfIn PDF document text
    • http://lucavolpicella.it/userfiles/files/56899691961.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efce45d46c---ketazeg.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7cc0e0dc---lapodonudokuzewitaturi.pdfIn PDF document text
    • https://yuss.it/file/62822958130.pdfIn PDF document text
    • https://mfdesign.hu/files/file/77688612287.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/noparukuwuralidete.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/romat.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/f2cf4bb0945df538a9cadc4f91ca4954/fofamonovifilezumozapagar.pdfIn PDF document text
    • https://susta.vn/userfiles/file/82805668281.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/f5b5830424285aaadf697bb8d11866fc/50639452410.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fbaecf76d---41136704237.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/sogoduliderapuloma.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/d11f47a670e4e16218844a10f9b1cccb/20276161240.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/f8116722e7062dd2105dc9248e8a295f/fosul.pdfIn PDF document text
    • https://edarky.net/data/file/45451483491.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b75abf381---mubejuj.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/5a01a3655aff8387577a397f0a9bd4f7/sowoloxolupak.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_off00010b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8C 18176 bytes
SHA-256: 1fe357c2dd4b8390c9694f253c54c139a58ccac4153103ce6ed98611d85d3db4
font_01_sfnt_off00013b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B77 10704 bytes
SHA-256: f2a127e7ee456ed3b140768fbeb51f05f1c25907413c67021f0fa97297a5add6
font_02_sfnt_off000153b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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