Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebeb2e89a1bb758…

MALICIOUS

PDF

88.7 KB Created: 2021-07-25 07:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 08f9cbafbd4765bae7d52b6743eeba37 SHA-1: 5a97e9f707e124cafb853c513df2da6c11f75056 SHA-256: 8ebeb2e89a1bb75899feda72ff2f85033e19b53f8ccb9f089965b7b5ff24d4cb
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document contains a link farm hosted on compromised WordPress upload storage, pointing to multiple unknown PDF files. The presence of these links suggests an attempt to direct users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a842442ad---79283004946.pdf In PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/susixinum.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6de3ae1a7---8341103739.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/31836376942.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/14f7b9952338cb5890bbb6aa4a8c5db5/vesizulolojidenufodixobi.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/48325111624.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f8623da84---67233445918.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609033370ebfd---pejirodusufewotubateboweg.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/2ce137dda290a43cc699f987f7c2616b/17821298187.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/gupokedifame.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa752988bab---bepodutasubexevepi.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e2579d51ce4---lasotumuwimufuv.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/xajovoturuwebav.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/refivuxem.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f4e7dd35c---76857450194.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/45453420574.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/81297004617.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/jomifivisubozujitof.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/xeluzajogebagipoja.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/regufugijibunijemagufen.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/72286416846.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/cee74767f7eea428aeb2d536c16a367b/mikodaju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+are+the+12+zodiac+signs+and+their+meaningsPDF 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_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F00 10996 bytes
SHA-256: 7bbc2b826a134537175113322d75287969c8549abf6d3606f422c56890db9f1a
font_02_sfnt_off00012852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12852 16920 bytes
SHA-256: 86b709e8d1976824b82989981a7741a414ea8abf219709ebde94f580fad2f6bb

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