Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cc810bbab7446f…

MALICIOUS

PDF

91.7 KB Created: 2021-09-07 09:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 33a987e9dfc99f4e05e357d445b88ab9 SHA-1: d82c293af60ed6b8a1c843714d8c77e97fc5a410 SHA-256: 14cc810bbab7446f97f52448104ded124d10ad155e6ab5ce188fad30e0e3bc50
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous external URIs and is identified as a link farm, likely intended to direct users to phishing sites or download further malware. The presence of multiple links hosted on compromised WordPress installations and disposable domains reinforces its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://smidgel.ru/uplcv?utm_term=panasonic+gh4+manuale+italiano+pdf PDF link annotation
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/77bbdc7acdd1459a720d83b281093a4e/15566224168.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608faac78c775---47912102355.pdfIn PDF document text
    • https://nexusmediation.nl/files/zifileb.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/nirekima.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/40562232760.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750734afa74---vemeboxixupamidupoxan.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/euom5291snhdpikb2av3g0ne34/zajuvanemu.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/lizofezanamenotarevumo.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086af8a09419---jixawegigibukukanan.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085105fc5fc9---mobuzupusogukoxedafivux.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b9bd767a4---82251238962.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/57809908180.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/xugedavipojugadis.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/f952ca2e1db22ca778ed55486fb24faf/teluzanoripusup.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/34755526942.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/butadewoditin.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/068b3a1666f00227b63b9dbb80cfe708/neluvajuguzovoru.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/8099291409.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/45382536482.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e70baf6f610---36509527576.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/33791801321.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/71393353711.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d6570038b9---bojapolomebanalup.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/juzaxenomibubedudamebuvu.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_off0000ff59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 17664 bytes
SHA-256: 8434576bd1fd25c76d1d0cd91e2f2036e244131e10fad1b1e2993ec081a5db63
font_01_sfnt_off00012da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA1 11148 bytes
SHA-256: 388765d250fed1868bc092be08619e1777ac019b03f6129f647356860c0d049c
font_02_sfnt_off00014758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14758 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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