Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41383961098bcea…

MALICIOUS

PDF

86.4 KB Created: 2021-07-18 00:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a0750da046837e0508e28fdb944eef5 SHA-1: 26916257805903cdef109ced283279565add2ac7 SHA-256: c41383961098bcea8825c952d1eda6f2c0f06ff215d7037f633422a0bcf9f589
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1786e0e4---zozejugetamisolokevezake.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f691c518e---ligagiviwive.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/dfp3iebhpkvjkplncgfbp1sd07/bixob.pdf
    • https://empezo.xyz/js/ckfinder/userfiles/files/98241737706.pdf
    • http://eurogeographyjournal.eu/admin/fckfiles/file/51998343978.pdf
    • https://reazfarah.com/ckfinder/userfiles/files/40660928282.pdf
    • http://azizolace.cz/images/file/53825497273.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/18799bc1f33fb4f2ccb1889d594373e0/wafabonesuvosaberibiremit.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/3fed08fa71b4091097e71dfc4a9e68b4/sovaxikunukapa.pdf
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/paberegadipeliwutenonor.pdf
    • http://umiyawoodworks.com/fckdb/userfiles/file/54907808786.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/rr864ncbn5qhvlvceo5le4s3s4/sigobagu.pdf
    • http://bukharasuwanee.com/sites/default/files/file/fagimiligiwemikodira.pdf
    • http://www.kickcommerce.com/userfiles/file/kanugirigenelurepukelati.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/b48ce13ecd830ecbe6e9a89da45d5c3f/jumuxiluwudupabarikurigik.pdf
    • http://www.lnk-creation.fr/upload/file/21668370499.pdf
    • http://matstravel.ru/userfiles/file/94415539295.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e6f8137e---71301980248.pdf
    • http://vdadanang.vn/app/webroot/assets/files/newisaxemekixemalovukobil.pdf
    • https://madopin.com/calisma2/files/uploads/tixaxugozuzelosuziso.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/06d7fd15c2040aa3f8e723194e730ee9/ruziritu.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/au3ij346783soet6dk9hej7gvu/zogafevir.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/gbe14cb4vjnv8refq9318s2hlp/baxalek.pdf
    • https://alamansyria.com/userfiles/file/widekipozuvogixisata.pdf
    • http://hyunbulsa.org/~ewedd2/userfiles/file/jawolos.pdf
    • http://ccforum.kr/uploads/file/1624779413.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=trail+of+us
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e8.bin
80f4116a0696f16f253c45ede8c403ca3778205e34084a15e8e810ca15e536b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E8 9936 bytes
font_01_sfnt_off000107ee.bin
77673725ed21d58a3362f2de3ab809689be9f305bba0393eb1c120c80384c9df
pdf-font-stream PDF embedded font (sfnt) at offset 0x107EE 17188 bytes
font_02_sfnt_off00013433.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13433 16792 bytes