Malicious PDF — malware analysis report

Static analysis result for SHA-256 f990f5b3c89a37e0…

MALICIOUS

PDF

88.8 KB Created: 2021-08-16 10:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 215490b41749224fec6b23a0bcc4e291 SHA-1: 8e44c1a49c04103561349db60a5a96109fcaf2b4 SHA-256: f990f5b3c89a37e0733ee580ccc5cd5f8c04a7ba51ec120a13997c6f0e093162
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs and the link farm structure suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7351

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://irlanc.ru/uplcv?utm_term=final+fantasy+x+expert+sphere+grid+guide PDF link annotation
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/3e6ee7e87287d256d92107f539eeeef0/rezeladujopiro.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/12895782977.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/48786124094.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/b545dc641534134286294725a32d8846/guziwoxusipizekilutodi.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/h5mf1vgncg5asj1u4te24f04k4/31242284492.pdfIn PDF document text
    • http://carszana.com/image/upload/File/25603302412.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/tegipabuwibitulesegal.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-17/20210617210522605442.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/9aea902296e179bd69afdda2f2f5a29c/36336120112.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/pvtqomabas2l3h5nfh05k6t6jg/xebiwusobudix.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160700a735c337---84108586747.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f58ab9b49---29865871032.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/zaduw.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16084c4f79e00d---totifodi.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/xerefebokig.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/13817145908.pdfIn PDF document text
    • http://cascad-trans.ru/files/suvigajenuzetojowefevima.pdfIn PDF document text
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/83561610500.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b85fa939145---teronekasofesowozufojil.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/25559251312.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76c16e841---89697300801.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/17169917133.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/gozinezivifozizuwobuwovan.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe50b48cf07---lipozopalumuzisemokij.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/kagawifax.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001354e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1354E 10948 bytes
SHA-256: 934acaa5b741b970875d4069bfb9c97e2b6212e0f82c12458d701efb5766102f