Malicious PDF — malware analysis report

Static analysis result for SHA-256 59fda0ffed0a4cef…

MALICIOUS

PDF

95.3 KB Created: 2021-07-31 02:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 14db7177943bf3c0d4475f83d68a543e SHA-1: ff32297dc5a638ce1bc5eb7566b131936cca8155 SHA-256: 59fda0ffed0a4cef7aa7cd1f5fc9995c7d2b183504aee571589a9d803914272e
164 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to compromised websites, suggesting it is part of a link farm designed to host malicious files. The presence of a 'download button' heuristic further supports the lure of downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=playerunknown%27s+battlegrounds+license+key.txt+2021 PDF link annotation
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ed07569f1---dofiwikul.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc83b598b---polopawewelebof.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210627_060247.pdfIn PDF document text
    • https://codecs.ro/images/file/gilaposebasejavofadojod.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/gajajopizesa.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/f5d3606132d5b4373047001eaab21da3/vetiri.pdfIn PDF document text
    • http://u15.ch/ckfinder/userfiles/files/7593217375.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/mirogewotazokojirutojefi.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/68520e09505f89203ff8e124a2693ad7/27804111267.pdfIn PDF document text
    • http://ihdbd.org/upload/files/13910774885.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/ffe0ecf4dd84da09f010d9aa0fc86ef4/fidilotufapedamanaj.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/megaxuwegoluketejobipagu.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/buliluduzumi.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/1c7b7abd5db955bed816c63f3da347ab/fokaji.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/difetudegubokaxa.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/lutidabifiwafuxadaro.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/41509317546.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/71214409222.pdfIn PDF document text
    • http://womenscouncildallasarboretum.org/clients/85748/File/zomimomuralasugazurego.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607aef2d89089---82422513742.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/fezipagokez.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071c0b173970---xivozakekotufowikik.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a45f502a2b9---wepilon.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/0amj0poh5mhdc8pdqegovpkhn6/21604477093.pdfIn PDF document text
    • http://vvk-wiedermann.at/userfiles/file/wabolozafonawa.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3ad18412e---pofopitimefeku.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_off0001088d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088D 11576 bytes
SHA-256: 73b01cafe48736bbd679ded69706ce8d3bb282a93c7345510f771ce757be90cb
font_01_sfnt_off00012434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12434 19120 bytes
SHA-256: 89d61730733c4fda2f2a8b71bf3ee02efad525740b3ca90988b492cb51eff4b2
font_02_sfnt_off000156e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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