Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddcff78363fd5c5…

MALICIOUS

PDF

96.0 KB Created: 2021-07-04 06:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5512e0b4bdec4a1da1a26626f86ff166 SHA-1: 5f55948ce7e6d931126586952c1f4837be786e8b SHA-256: 7ddcff78363fd5c59c2ccd2118938a5d8d90b66dc306b60981686b661ceb21f3
154 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6190

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.
  • 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
  • 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://queure.ru/uplcv?utm_term=the+part+of+the+seed+which+develops+into+the+plant PDF link annotation
    • https://hitourkorea.com/FileData/ckfinder/files/20210626_D2625A47DDD5FA1D.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/22642484132.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b18386a061e---wigunukevibujubojolalu.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a13e0df5c---vaxivezelemedabutezadow.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/5c3b22a33e56de544489c01bef520763/muretoni.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070572ebcd0d---15299927897.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085445b7d2ba---61320502205.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/6dp5c8j4m2ht9mid4aumju8l3a/mufalenonijigip.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/69604198002.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c645a268c0---losivufemazolonefiwumoru.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee9e63bfd2---gugise.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0e618288e---bosufotoxuzigarake.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/2454b2b8562639c9a43a5f2035708bb0/93368626444.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf623a9d75---vamixewejejimome.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/ba803078c2182df7c5dccffd8849a43f/kenepebojutob.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/4kofq9rnhfcgh2odjs8010sn8p/25254722525.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/cf0roasu7u1s012qr9mcukmukm/17755158970.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/006b9e07c1de660138ce9f9ef2bb4f1a/vulikajefigixir.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089f7ccae87e---lafudawivopenexani.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/3631924333.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/etmb0olrmh3hc4381ql736r0g7/47494754404.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160945f8423eda---jororotipunizawuluxifimu.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/96146947144.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/jd0cagil0rrr8moo8kdsf51i03/6577492577.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607207f97dd3e---dalexopugodifarefelone.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/21ad1977fb4b18d8c422a011da5f2b12/91346951739.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000169dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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