Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2eb29fd75cd0b7a…

MALICIOUS

PDF

203.2 KB Created: 2021-07-18 21:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 76764b80064fcf7a8b03b1124ef9471e SHA-1: ee1a0bca8f265662b808d7bf9255defbdda955bf SHA-256: b2eb29fd75cd0b7ad9a2a11c526605a563819f67421d3324c0d5b07856d059d6
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, so the primary attack vector appears to be the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 5

  • 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.
  • 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://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/6p83sdhrr6q797sdpo16692cl9/zoveje.pdf In PDF document text
    • http://aimic.com/userfiles/file/96225019496.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/e796ad4fcb525fac757eb4a0a44ac1ca/reropitodisuvosaf.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/37378165301.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944ce38c3be---ronenuriwawozozikira.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/ralatagesow.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/migutar.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/4udl94q0brji38prp2um335tf9/8387807785.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978dce57443---kogolixojakosomumemoveza.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/7uc783vg32lu10stbq9d1ctkie/62697840738.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/bf83a70e0c57f98d793dc44c2a1e290c/zefez.pdfIn PDF document text
    • http://allasclub.com/campannas/file/1989146510.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/77585072459.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/aea806470826e8abcf087ba8f2e66046/80625999193.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/r0a9t79hcvmk09i3uruole1163/98862976161.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9874badad---34092996206.pdfIn PDF document text
    • https://transit-connection.com/userfiles/files/28449357307.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/40939785740.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/7efdbe081bd5aa1f3c62c298084f65d4/40853704382.pdfIn PDF document text
    • http://ridendo.cz/files/file/91981908659.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/006a5ea863599525be3e703115d677a6/sapusovopepod.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/8b14145d6676c1a2004a03d6a282914e/jeweparokomosatewi.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce8484f375---vodaxuperezaxi.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608804dc44b84---18014131835.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16078d979476aa---26198236456.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=plasmonic+topological+quasiparticle+on+the+nanometre+and+femtosecond+scalesPDF 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_off0002b9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B9D9 19192 bytes
SHA-256: c71d55131c52808d40094031ad384cf50bf0ecdb00eddcba1a3fcaf0d7e5a759
font_01_sfnt_off0002ebab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBAB 11312 bytes
SHA-256: bc98955f81f52e695cee174ffd9c85654314dd0e00c9fd4334c3722d150c4589
font_02_sfnt_off00030596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30596 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1