Malicious PDF — malware analysis report

Static analysis result for SHA-256 5367f3e9e202b241…

MALICIOUS

PDF

86.4 KB Created: 2021-07-08 07:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 60ed4a9a957ffddb1e8ac8597bf29eb9 SHA-1: d06e3118b208a44bd00dd5bae0f2bb437840b548 SHA-256: 5367f3e9e202b2417a6af36b82f272beab8187ec5a698f046ae4e1df3a94126d
156 Risk Score

Malware Insights

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

The PDF file contains a link farm hosted on compromised WordPress upload storage, with multiple distinct hosts and a high number of links. This pattern is indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9d3a3412c---83565313718.pdf In PDF document text
    • https://music-group-store.com/upload/files/56919733184.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/podaxevogozenidigadavin.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/ab0e19a12541718eb113994ebf535ef4/68163754163.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/uvrt79rjk14tn3d997b5i9dcqu/13638868696.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/81616888683.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/4bc773ff89302e5f65e52099def0a6f6/20561406033.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/9452a83419ca6254746fce7e86bfc291/85358709068.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/91269185896.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/76a276d1388fba112e02d85f03c128b3/24612949086.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/jozezejaw.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba0a3bb60b---wabexexitewosamidivufiwit.pdfIn PDF document text
    • https://esvigo.com/upload/files/58738292633.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0526554001623959548.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/6d1039103d65394d4858efa2793dd06c/25934948242.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/kt17spmfasfjtkm5mq28spb7hn/jovilomomazejileza.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/tawulofonulonodelebebu.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/40104350509.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vmesn9qouse1o5gf08pebj8jt5/66731651935.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/12109396917.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6b013ff61---gitewexupawozoforatiledot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=one+dollar+and+nine+centsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E3 10388 bytes
SHA-256: 75b024b4c8e88ee337e3102d3c32778a3869e3c31918577c240bcdbb2a99bc8e
font_02_sfnt_off00012083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12083 16968 bytes
SHA-256: 97717d73b5c33b165116913fb94a63f3d0a2f3fb51c98c7d9a1e03ad462be8d4

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