Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2fbe47c5182834…

MALICIOUS

PDF

79.4 KB Created: 2021-09-03 06:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7f2b92f0fbe277c257a6c604df3b3dca SHA-1: c6bd9327659074a1df5af696f78b4f13f1ea8ac7 SHA-256: 9a2fbe47c518283470b4018f27b936cd0f2448e985ab0bc7ebc16594a51bf0b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it's likely a phishing or malware delivery vehicle. The heuristics reveal it functions as a link farm, directing users to multiple external domains, some of which are hosted on compromised CMS uploads or disposable hosting. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/zedewiduxibotivij.pdf In PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/1be043c5a99ea98a01c78c0aa27c95c6/jimuxakubut.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/xubiroroluga.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/kuxar.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/84823628056.pdfIn PDF document text
    • https://chp-travel.ir/data/file/97443216392.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c10afd6abc---22393715274.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/putebakazagubuvolefezapa.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/30989841459.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/guvozomupanorugen.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c12697dd9---tapidosurofenumepabegexif.pdfIn PDF document text
    • https://windsbs.biz/files/file/39152061557.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/tofevogupuzobinuside.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/23121945359.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608229097cd22---75830624469.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/luxejemuxeb.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202107181802359470.pdfIn PDF document text
    • https://masukpt1.com/contents//files/68072179838.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/kinalikerawe.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/dalobugifuvexixovujo.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5db07e7f5---rizubenofilasakaxufowudon.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/tujowefagopekeg.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/96092416081.pdfIn PDF document text
    • http://mckeoughfamilyreunion2021.com/clients/b/ba/baf9e6b347377fae0abe5a87436fc4cf/File/nekitovolizo.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/55172294934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=reconnaissance+de+dette+formulaire+pdfPDF 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_off0000d15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15F 10928 bytes
SHA-256: be4b2bb30a26dc2a181d980fc3479cc965582e57c6c99e0ebca6d6f64c9f6242
font_01_sfnt_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C2 17880 bytes
SHA-256: 0f6416efac0ea677ffc916bff5374ba3168eb68db76184269211c171781d0ad0

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