Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ffdfad2b516e70c…

MALICIOUS

PDF

72.7 KB Created: 2021-09-04 06:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e6d867dfdf6d2f5e73332e8660ae1cc4 SHA-1: d70b89842ad6364ac8cb3588824ef2f110aa2cea SHA-256: 6ffdfad2b516e70cb4129f9951f13eae129a02d15f0e5fdb62a192e7d3512f25
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to exploit users through a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=gates+bbq+menu+pdf PDF link annotation
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/smd39ln8rk0tefcsr60tlett61/73134694653.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/14739196113.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/65318009814.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/71099889400.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/c66240dbf703ea427f888f443c430171/98654097730.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/tuvupibarirodizudo.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b180a491878---pizapidakivemom.pdfIn PDF document text
    • https://denimder.org/resimler/files/56620835227.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093b45d5d8b8---79236380431.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/xiwabugabawob.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a222066095---7557754139.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da02c8a70b---vuwanol.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/kuwakidur.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/9aa51b07b35bff75dcf3c62cef8ec123/43169124493.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/vifesovupotajuki.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102b80f68c02---wemotujubow.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/73713832455.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/52152996292.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607abe9f26c57---47936713440.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/92151164101.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/gazekogunikapuwodusojupu.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/78191556924.pdfIn PDF document text
    • http://npas.ru/pic/file/fanafewovixuw.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/78e65ea447e6ad9a81345ae0a24b3d6e/11908219504.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_off0000baad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAAD 10724 bytes
SHA-256: 59fec25541e5811ff55c9c5352f80584423a546a7a0b5578dab2365611b728f8
font_01_sfnt_off0000d2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eaf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF9 16500 bytes
SHA-256: 0eef5e2b9b5edcda742ea21d4047788a033e9636ecf9102d240e0585038644b0

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