Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e062e5375b1577…

MALICIOUS

PDF

82.0 KB Created: 2021-09-01 18:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 73842fc8b4a22e3ef1906411d4ee992c SHA-1: 07c6e5f723fee5f79c5e1de60bf66899ee437891 SHA-256: 61e062e5375b1577f95860e6a6810ff9e9ef86fd6f1270c112f4fcd9fb5f17d9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of these links suggests an attempt to lure users to malicious domains, potentially for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096537dd4b89---85288138296.pdf In PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/33294842561.pdfIn PDF document text
    • https://kopari.hu/files/file/pakokujukotaked.pdfIn PDF document text
    • http://agriturismofattorialucciano.com/ckfinder/userfiles/files/zivebafitelupiwixefel.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a847f216896---31949099697.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/selufurag.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b25c9a06688---medaninijoveniza.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/9051237aec58208b122b8eb79cf641b2/gisufusube.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/legibowiwirabalavuluxijo.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/pifuzewezamogajez.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a66ad4dd8b---kagepokusuzuwujajefavojuf.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607608390155b---51364529421.pdfIn PDF document text
    • http://jaatkinson.com/userimages/50794527071.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/8426c6730d040dd2860f1b176db75357/nedubomegalax.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/94236789199.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/datafojusisawikate.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/r6gbeppu7k4mvhgcf8ph28vu94/tojodetoziriliw.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/fudakazaw.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/moximorigojinomuzoti.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/pusijaj.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/rifiroruvafubukixeme.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/fomukuxokoxex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=save+each+page+of+a+pdf+as+a+separate+filePDF 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_off0000dc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7B 17012 bytes
SHA-256: ead64a47cb50e663eb606c63a649d40fe51d25c598f0c47a7530bd10122a43e1
font_01_sfnt_off0001084e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12065 10936 bytes
SHA-256: 58d443a458b466bf67e4791d3e71601832f118c490fa56803a7e1ae870aeaeb9

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