Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ab9c93d375591c…

MALICIOUS

PDF

84.2 KB Created: 2021-07-30 02:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 290278c36530a8571120fe15041ffd9f SHA-1: 9ef189edae07514b263f4ec5c8f15f9c030fa826 SHA-256: 67ab9c93d375591cf43d5a3d94cd635cf83569b8330561123e5847ecdf5c926a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d38e88a17b---milubuziwadijego.pdf In PDF document text
    • http://nsdadventist.org/FCKData/file/75288199225.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/14495424857.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/16599971995.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbfebaf648---78038445339.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/p4rdr3i4ct3vbv0gd059hkiu32/56210794212.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f18fe557c---tezizaxuxeku.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/84605318050.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/uemi1p9hat7k56l5locn8ui7cv/45197265351.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/14750984296.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/vugovujeliroz.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/12993335732.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/46962216936.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f476be834c---danogerefaj.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/68551617922.pdfIn PDF document text
    • http://armanetti.com/images/medazoke.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c8e7e9bb6f1f9539a39f176193b20188/wekijuzojofovasefupis.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/1457498387.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/gisefaxakiza.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56586054916.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/kgdtpgn56f8easphlku31gp101/sujebegixoxage.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608826a1108f0---jenefumovaradezufulosa.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e65d0694b4f---gifij.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/44198294479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=infinitives+and+infinitive+phrases+worksheetPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF56 16104 bytes
SHA-256: 74d5ff912e5206794c4c5add27155c5ce5cf5e1ff194f0a33f59226646a82e31
font_01_sfnt_off0000e49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49D 17020 bytes
SHA-256: 6188b72841f35f2af7f6fb5f4a958b4121fb69ae5776047efbda9deffbd1d423
font_02_sfnt_off0001114a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114A 10744 bytes
SHA-256: 4760bb586a8d48d180a6aacfa3f5bb0743ca9ee964d81d3a9026e2b5f5ee3417
font_03_sfnt_off00012a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1