Malicious PDF — malware analysis report

Static analysis result for SHA-256 aded212e3bc49efb…

MALICIOUS

PDF

90.5 KB Created: 2021-08-15 16:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5955e53e8293a0c4dd8b94988f912da6 SHA-1: 5d23909266355421e7c2fe6c4432217f2c988a4c SHA-256: aded212e3bc49efbe476788aba86359ea5c46d0c13bbe9c21d9be0ce212ae3bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content or downloads. The presence of multiple external URIs and link farms points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://liddellgaryfamily.com/clients/863293/File/telobuvu.pdf In PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8515f85859---fobav.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080db2941d64---rimugerozuvomiwifobim.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/kojejetarimulijewivaxug.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/b42ba233468efa6c3f1359d00600890c/42753966550.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/88563130128.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/ble518ig80rmub6b4itklcjbj2/29319685057.pdfIn PDF document text
    • https://proxus.nl/file/55973715231.pdfIn PDF document text
    • http://markone-tools.com/upload/files/18673583286.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/39857238411.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607116d32efb0---6507978134.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/d6bd39d0d264d72eb1b547adb021e473/tinifekazexini.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/70016012451.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/netabamokel.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/tugujulunatajidowab.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/gikasuzakuvuxukat.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/75691252209.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/82598386635.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16104621129acc---72059374722.pdfIn PDF document text
    • https://kuepancong.com/contents//files/xekin.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610433f52dd68---94281845027.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/29511365066.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/terimiborusozif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+book+of+beautiful+questions+pdfPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/roxasanekugidelulivelu.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_off0000fa5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5B 18784 bytes
SHA-256: 32f0e66e88ba241e70a038b7a839b0d02e8a8753d2aa74e278a4f6a14baedf5d
font_01_sfnt_off00012b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14319 10936 bytes
SHA-256: fe56602464fa606d3df90d4c1ee8179769921a128d3b4827984823b79e917a6f

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