Malicious PDF — malware analysis report

Static analysis result for SHA-256 216987aba2842db4…

MALICIOUS

PDF

77.9 KB Created: 2021-09-03 21:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 609f0dd899537b54e0f72de7531f7587 SHA-1: 34612240b6e84fb7eaa2edfde2fc31e2cec4a015 SHA-256: 216987aba2842db43a5d1f4c398264eaac869cb92bcfe33fb7acf7429b4ef2ae
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4dff50d3cf---84475030112.pdf In PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/58866349227.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210627065743.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c488b0680---73333505953.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/nirudos.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e211bb62c4d137ea8e76ad305bf4fdfd/78231647458.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57337632238.pdfIn PDF document text
    • https://windsbs.biz/files/file/junoworoluje.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/33b15d812b86e906702c5248f4706af1/liminuvuve.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/fufadopana.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/794d10bbe05f771efe7e8bd0b05201b6/rexeginakesa.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160906d43dc042---sakekikemaza.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/fujijinuwikovuladif.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/pojenelumiw.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bb0a0b0bf---50541162101.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/wodotafivimi.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/73660263278.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/jubadodile.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5493d0dc9---tebafik.pdfIn PDF document text
    • http://seamacros.com/upload/file/28707327191.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/23495062593.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/zuvarunamukalafe.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/kemavagajizuvevogin.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a39d758452b---jikebiwapusomefeme.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/95202001465.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a88432d5c9a---46712679635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ways+to+reduce+stress+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_off0000cefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE712 10576 bytes
SHA-256: 97f9ed5542c329e05388e6b6919d04c1b879f8549b16ba9b5c083380523fea23
font_02_sfnt_off0000ff6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 16692 bytes
SHA-256: 0872fa628c6653c03fa67cb720e6b0d0852da1151d9abfd9a19d5aa8aae6bc19

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