Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96c9e7222227721…

MALICIOUS

PDF

94.4 KB Created: 2021-09-03 17:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9d7acab04ae404d878a2240bd6ecd561 SHA-1: 59446b3990065a62228a178d162735d537b5480e SHA-256: f96c9e722222772126b2c1d2a5b4af622a7638ccccbe4e7c1f77739807bfdcb9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccad50b774---29301772040.pdf In PDF document text
    • https://ancoraeducacion.com/images/61319337462.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160e0965b7c76a---xidenosodarinawamumogodi.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/43086908035.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/92777092113.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/kgo6plmmj9av9id8o5jfelmd02/81041838507.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/59582687632.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ff7399b09---malegofemuguw.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/i9q3esqdig8q0gfld56rd092m4/gofixamar.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/1360616071611d45768e7f2.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e715f365e---jovatu.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e4f31c7c5---mopex.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/84bec3008f3a3f9ba2a144b7c481d1e4/wefalawodagezu.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/97ba9a4fbdabd680ac06af44e72f2ce1/56226267991.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/dabufaxowulilisenekanexur.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/rezokewares.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16088564b532e4---lexewabikatopoxadakos.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb31ed9bc1648244c02fac086f377b3b/xoliwixinefeg.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/dc481f93a1e3ef06dad4756f0746f634/71721508927.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/61090957773.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/niwituzejadejafiven.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/8231127994.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/58616593473.pdfIn PDF document text
    • https://ghnservizi.com/file/mowosigesa.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/kifosemus.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/35791122605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=thinkware+f200+dash+cam+manualPDF 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_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 20440 bytes
SHA-256: 4459aabefe2585927b832cf83389f8eaafd8a8410b573e722966f6febe73e633
font_01_sfnt_off00013a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A72 11008 bytes
SHA-256: d76935c5a6a6f6842d26381addad279f5cfc93d309e5ba9e4941ac732eacc23d
font_02_sfnt_off000153ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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