Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb15e412df0d69d…

MALICIOUS

PDF

71.2 KB Created: 2021-09-23 14:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5993279ef923d5d682b7163b28f407ed SHA-1: 1ec7aaae57ce6e4cdabd8dc3e9b9137276954c05 SHA-256: bcb15e412df0d69d3bbcaf4cd938d7a9895e333463405a1a0b1710865dea52e8
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. The presence of link farm heuristics further supports the classification as a malicious link distribution mechanism.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4905

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://pixomot.ru/uplcv?utm_term=watch+tom+and+jerry+the+movie PDF link annotation
    • https://acerocorte.centralcms.cloud/galeria/files/9896572695.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5b7b0420d---lobedetuzojisekulo.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/kawexubu.pdfIn PDF document text
    • http://tecksco.com/upload/files/tilivulavuzefirusiva.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/87593017226.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b09bdf37c---41760266897.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/66964617421.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419cbdefb99---46609548747.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/47685749915.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109130352172380.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/27331259695.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/70115092888.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/93269235981.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/pababuvux.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/filuzagamefukulipiru.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/buwebixedasawesubivopum.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/jipibokoxirut.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161395c6cf3e58---metud.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/94953974952.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/10294519132.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/15916058767.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f42f406303---jaselipavuloxavatesito.pdfIn PDF document text
    • https://mk-pamyat.kz/uploads/files/85120673223.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/7106063047.pdfIn 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_off0000c11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11E 10724 bytes
SHA-256: 1111c6d3aa3be1023ff255bab0c03bb68f32c8de44e0821bb5e436807e539299
font_01_sfnt_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 17636 bytes
SHA-256: ce132089766e9d3b04efeb2319850072db1f3c4ea819773c825e0b5846499c0b
font_02_sfnt_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1