Malicious PDF — malware analysis report

Static analysis result for SHA-256 4654d34dd39a54f3…

MALICIOUS

PDF

45.6 KB Created: 2021-09-02 14:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0245f35bf8e0c2b935f94d1b3ab7593e SHA-1: 17edc71ece099a3e21702f0b4b6966651d7e50ce SHA-256: 4654d34dd39a54f36f0a00d2ae3b1dbdc957df481cc0c6c37c3a6a808d03f170
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised Content Management Systems (CMS) or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5215

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 http://restauraceeverest.cz/userfiles/file/13234503443.pdf In PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/864e6e3127ac88aae5595c72590fb8a4/30352926863.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/58680435451.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/viginejoteb.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c6eecc39e---vapewejojubizezamosujesof.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/rixuna.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ba1f209bf---89480445636.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/04ppcdq431988dggg3cb3neuts/25955515283.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/82125467576.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea66c0d5a---fozusurixazuzedafibagupat.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/riragiba.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/xoguki.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612eff0488fea---20005593818.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/25304982379.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/fpbdv7bkv73th23ijtrvjvpaoc/butezoximekudulos.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210731235918.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/56226919681.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080b0bf74c63---11544962817.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/16273044703.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cc3bbd069---faporigofifipofapida.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/resukode.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/wexekusatadazojerusi.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/rufaxalunejepezilodik.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e0302d7b671---274176486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=meiosis+review+worksheet+answers+pdfPDF link annotation

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