Malicious PDF — malware analysis report

Static analysis result for SHA-256 c360d0590c53f034…

MALICIOUS

PDF

80.0 KB Created: 2021-09-01 12:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 728aac738f2f8d29dcc48f217bc8984f SHA-1: d2e442abdeaf5b478489cb945b7398d5a6215cb1 SHA-256: c360d0590c53f034e4c01ec5033d7a6d111ba5e5b0914417c6153325dae18472
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and link farm heuristics indicates a primary function of redirecting users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/1b92f1ecbb8376a6dcf53fdd37091041/povarojebar.pdf In PDF document text
    • http://farashimirooz.com/files/molesuvig.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/42395070640.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/4c4a7f612d1ef2208b1f0df937eec8e8/33024221547.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/1o6eg4bcpjluu9ab4i524s7q1h/bexer.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/kidesukukobubade.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf1b1debe---saduwifu.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec3e93df8ca---37421337533.pdfIn PDF document text
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/ribubidunanuwisur.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607363222263f---ruxofet.pdfIn PDF document text
    • http://taxfreepoint.com/file/29859307906.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/doxagatidulavojiluxo.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/vuwuwogutumepep.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/e0e30121339eaeb6f14379da91075ddc/loxotuxemakugu.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/33d3506da09a751188fec2d680a607b0/83862644703.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/megotuj.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/53i0kvqakmb000ot1aldcim36i/87197645983.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/33560014126.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/84052e036dd36ab1a6dc44081667f5f6/87834820367.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/veratedezafatedogama.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086873802f3d---85601917538.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/gebuxajejometajazeweji.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/32061832029.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=happy+birthday+after+effects+project+freePDF 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_off0000d4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DF 10944 bytes
SHA-256: e5e957040778a4b6d254907721c73586edc19048d4627359a49c3a3d3c04b5cc
font_01_sfnt_off0000ee1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 17024 bytes
SHA-256: 9356b8af58e0d8ac25e7bb1120b274e8994275982b9f34f7d1e5561d9127e627

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