Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dde23d13c7c73f…

MALICIOUS

PDF

75.5 KB Created: 2021-09-06 20:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8d32448ba838d48e83b2a9a10181b10 SHA-1: 9e3f7c0fd5911464fd88dd96c5c0edca01ab435d SHA-256: 08dde23d13c7c73f4e390de0916123e65a2fd4f52a9ff6a3ba9b6ebf40ba8c97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple unknown URLs suggest a phishing or malicious content distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a49e69adaa---82453377866.pdf In PDF document text
    • http://lakes77.com/clients/47041/File/zarenibuwasabejulojamotez.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/mobomezefozitub.pdfIn PDF document text
    • https://susta.vn/userfiles/file/kibofubedugaxugakojomega.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/wisoxasofewufiriwojig.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/66478318653.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/gudonek.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2fd8adcb6---wuperibunot.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/17e3aac48205d664a74512a6cd407c17/kifikozifexubiwiluridiwog.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/pedezexilijivip.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/38115470114.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/98238119584.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/wugejot.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/505fcf51b180ecbd58c142857b1301a6/vanal.pdfIn PDF document text
    • http://dgone.kr/userfiles/file/20210811105745.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/varuditubomilezav.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/dimonujedulisujo.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607494ef7b880---bapuxivujejavenor.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/88261216156.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/92254796299.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/84436288124.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/berupowizepugekidox.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/maxoxilizufadajorute.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884960c1f82---susapopasenawukemofo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=best+pdf+editor+free+downloadPDF 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_off0000c472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC472 10632 bytes
SHA-256: 7fad40450dbfee69d7caeb1eecb92e29012301f9cf9849ccbecf16b33dd90f95
font_01_sfnt_off0000dcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 16948 bytes
SHA-256: 1c69cd8f34aae466e6383fe4276cce14ad2a4013a4fe273c9aae77d140af93eb

Open this report in the interactive analyzer, or submit your own file for analysis.