Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded3c2ce2e7ee646…

MALICIOUS

PDF

155.5 KB Created: 2021-09-03 02:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1b0ccfbeffc2f520128280582dcd2b28 SHA-1: bf27eb318fe0e1184bb95f5692efdf357d228aea SHA-256: ded3c2ce2e7ee646e3b5fdb60a10e8b34474225a6a9fbe7913111a4795749bc3
124 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, suggesting a link farm designed to host malicious files. The presence of a 'download button' heuristic further supports the intent to trick users into downloading a payload. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/a2679558afc9b5b7ec127dfb9b67b0c1/jezipozetedopapezab.pdf In PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0b3a23f04---kijewizetifitumixu.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82b93a85f9---gidudasagelurofe.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pisokf5aaopn64739gvalr2cv5/62299399372.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/49176404264.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/45140254134.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/94863448673.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b651dd5a603---palelunob.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/fevugidurapim.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/mokemefasexovem.pdfIn PDF document text
    • http://bienbao.net/uploads/files/xujiboxerodizi.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607032deee3fe---84891350401.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/lonolinufojakijuron.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/79890941293.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/2e0c2a663451078df8adca23e014d76c/rikupafagijasifofi.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/ruvotub.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c9827e4b538---lobonazonirasukekon.pdfPDF link annotation
    • https://burgaseguros.com/userfiles/file/18719339375.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/tixale.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/2192066d0f7f0f48653bf75d97b7a439/46684673181.pdfIn PDF document text
    • http://cocoal.com/uploads/file/20988538898.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/4640474512.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/28824683334.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/53544b1354f6c2e5a5f619db00790a8e/53951892118.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=holden+astra+2004+owners+manual+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_off0001f0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0E8 23784 bytes
SHA-256: 47c7faa839f4ecd8168da563a7651bb2b84570d62b2798f5d1c7bcb1de448cf2
font_01_sfnt_off00022df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22DF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002460b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2460B 11064 bytes
SHA-256: d57fb3e62a03bfadc27c4cb9a853f72414f503593cce065f000bb9470d624273