Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebfe40320bead84…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 13:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0434eb09acbf21889dbe6f8e66d76807 SHA-1: b92d07840c71d96b5adf1cd7e2accffcb7e7dee6 SHA-256: eebfe40320bead84850a79238a791e19868a99ed373794e02bde664e84a32e1b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=are+garbage+trucks+automatic+or+manual PDF link annotation
    • http://hnspkjx.com/d/files/jeduva.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/finosazivusevunemogid.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/92452102156.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2a5f286a1---zifoxezesareluwonum.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093f951e5834---24310648795.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/99734512172.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/78282d4aa94388dbe8bf22fdf2c0ec3f/zisexonudatufimifuf.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079981f2c708---duzikubisudageworogawu.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/91083301764.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca884d57cf---64168686585.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/050f524cc494cd4c8d53995b2a34e6b1/lagetelivuwimixadidub.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/14f77749814b86731ac50ea544f56e34/55928617525.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/046008bbfea46cba229f971dfb64025e/jijazo.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/31043886055.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/luxofuxojukopiwekivozat.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e1d1b9cd60---zigewugirebinuro.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/91691535989.pdfIn PDF document text
    • https://andana.us/files/files/96906798140.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0a6e971d6---36801985809.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/degufijuragiwizazur.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/kovavogubunoditutuvin.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/bokix.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/gederatobawawamonevijo.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/kepike.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/gemolu.pdfIn PDF document text
    • 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_off0000decb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 18400 bytes
SHA-256: 980b74d45c18ee784c0fe048727b820e178f6902ad23eb481cebec3940637693
font_02_sfnt_off000126f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F1 10888 bytes
SHA-256: ffe10b91b8b6c3902c120579908778412d4e38a8b5664c54642423c752314270