Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3cdc36465609ca…

MALICIOUS

PDF

64.0 KB Created: 2021-08-09 00:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4a1f932ee1d638acc7273a9fe34a298d SHA-1: 5deaa6c7231f65b64079d0f4a4434275777615d2 SHA-256: 4f3cdc36465609caa6f8a2dafda156dba033aaf7fd937094445072bd1990ef9e
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is detected as a PDF phishing trojan by ClamAV. Numerous heuristics indicate the PDF contains a link farm pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2641

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://catamma.ru/uplcv?utm_term=what+is+the+update+on+the+next+stimulus+package PDF link annotation
    • https://n-zvuk.ru/upload/file/pumivupeli.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/951717ff5288d642f58e198a0da93c76/bumemabituzozenejoro.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/25325885868.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c3602ec31---fefunafuvomezipi.pdfPDF link annotation
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/donaxerogekugamir.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/45485814108.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/vabunominavifufatekimu.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/3fkr5f6sbdbngirhl3d5quaph5/xirimaxenalatata.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609294965bc8e---87848817521.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/qmaeouvmim4muu978af2ih39oq/guweridanexibixerikoz.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/fadokititiralifelaj.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/nomif.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/3a5fc51229e8a08a0e43e9294e1ee843/tomaruxalup.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/38443824185.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/fop5nd5m6j52s5n81993k7ps90/mazaxosimu.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/h73due80kn2jij5rh748f31abe/tiredivewilibigu.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/a82cc782e1c8c4f4d7a081a3730c03bd/lukuduzimidevu.pdfIn PDF document text
    • https://wsbtitan.com/images/file/tirorudutezolojimibiruf.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/82039107507.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/fuxivelesugoxoxo.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc63074a48---xepuvarolag.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa40c8986f4---sexolusiduranagamudamisit.pdfIn PDF document text
    • http://vodnik48.ru/content/file/19080069994.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc424b3a29---1404835709.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/cc87b48a880468d7e516efc5cc4942d8/pesedegosexegi.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac75077674---nivozigusu.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bef9ef56a---gisewotojogawozerap.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/sodulifowixoxonarusupadod.pdfIn PDF document text