Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddfbfc8e80a7c7d…

MALICIOUS

PDF

82.4 KB Created: 2021-09-04 01:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8ac132e95bc467dc2198f781745fc4e9 SHA-1: b7d05cce3fe6a8f52d53fc65927d5eae6463a29c SHA-256: 0ddfbfc8e80a7c7d97cc2b6e160d414577117b023ee9440587813541a83eeff8
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting it's designed to lead users to malicious content. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics strongly indicate a malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd372cc336e---79905711981.pdf In PDF document text
    • http://udmvdpo.ru/images/files/42843170579.pdfIn PDF document text
    • http://planetamama.ru/files/file/zukuzoxizuxozojaxuxenip.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/tipexuvobogaf.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/bipegavinulepeko.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/gunutoseloxojipuxudap.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///95252288538.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/kiduwurunosutuko.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726975e751e---xemabemebeja.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8de5e1c73a---xekijipasuk.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/feropibukasanezekewig.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/baxulot.pdfIn PDF document text
    • http://getem.plfiles/file/86260726384.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d304267ab---losif.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/77655733035.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af28db53f63---9554460676.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fegezupepaboxuwuvuruboz.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/lupomozijowoj.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/33553879184.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/26519307462.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/sapatutivabaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=international+auditing+standards+list+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_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 10724 bytes
SHA-256: afb9ab1f00b9220575df16383f79aaad71eca65244ab5c83b25741925bf10e5d
font_01_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 16424 bytes
SHA-256: 59b0b295568b666b634049c83ecdf7320a4710b624aa5537332e7e3872d8c0a2
font_02_sfnt_off0001237d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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