Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2d17b62c9c5282…

MALICIOUS

PDF

78.8 KB Created: 2021-09-03 23:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cd1c1078487436eb0d921a9afffa9790 SHA-1: c8e66ef4d0b0b8fcc6008ccfbb48963f0c8578d9 SHA-256: 7d2d17b62c9c5282d1094008d2ac5717fde06c7c8761b8df918f536c46d1f255
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to other PDFs hosted on compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution, which aligns with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c94e03bb4e5dee6c9f92c71f4d4f1884/34628262213.pdf In PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161039c9eb1dbb---86030814947.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/d0ced5fe4ea97ebb8de3c691fd519ac3/gagunaduvo.pdfIn PDF document text
    • https://songhong.info/userfiles/file/52785349474.pdfIn PDF document text
    • http://temple.mo/userfiles/file/90883027595.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e729b0aa35fbbee289f1fe029fce7ea1/49154661725.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/81082594507.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/lu1l9mdpe0lo9985ojk0cs5jhb/buxanurikerezibawusix.pdfIn PDF document text
    • https://remini.hu/userfiles/file/rumila.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/lajapet.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/e83a7fee7f153df1270ac88be23b1eb6/98287140975.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/gobodunavazatov.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16124c88289789---72680367211.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/69049634787.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/2dj17osppb7ke6a3v8c43289al/49524812357.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/aeab32f2ec57f79f17aedeb0c65b4a54/fazajugudazoromidu.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/87355964984.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/86024042341.pdfIn PDF document text
    • https://majubesar.net/contents//files/nudepa.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/85336470441.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42fa786fb---42723439419.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/h0b671dk0agt3hnq2i85jbitp1/82037326156.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/lekisope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=chapter+16+statement+of+cash+flows+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_off0000d1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C0 11132 bytes
SHA-256: 3269f7ba5842fa8530e8d6c60cc58136234b8e46a33f93771abc6db1c9dea58f
font_01_sfnt_off0000ebbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBE 16332 bytes
SHA-256: b6c02d0cc779c452f1f8cceaf018ddb3213554d429654a6485fedb47074c6e41
font_02_sfnt_off000115a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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