Malicious PDF — malware analysis report

Static analysis result for SHA-256 e662f60ffac1b96d…

MALICIOUS

PDF

87.4 KB Created: 2021-07-25 10:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 163d9eac1d96e585c0083abbec0768a9 SHA-1: 5c6090f5412f74df3de1a007c3d9ce38c6b86296 SHA-256: e662f60ffac1b96d765ee03414b7323ae3c1c78aa288bc3ce0fe55fc5394f792
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5189

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://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/25db91c2176bef52c5af9614e607fa1e/kovirixufigaruge.pdf In PDF document text
    • http://summithigh49.com/clients/3/33/3334069ac8a672cbece4a9536eb221cc/File/bogijonifumopaxes.pdfIn PDF document text
    • http://pandoreunion.com/clients/81456/File/nabubutitemeve.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/40cfa3921ca8ad7eb12b0d6407de86d7/metikawajomulovogas.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/nezobo.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ssv76tqqf4qkh8ooavir62mca0/53495462075.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a528e994fff---21517096413.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160f601e9e31be---13476380907.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/25355296774.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/06793a215ebd34de3dcc0c548e3da3c3/81613514404.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a02640d73fe---35896940394.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/omb424ch3m22mad7tvn9nh6cmq/paxifegomaf.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8c5679ed7---mitojaxifakox.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a039a4156---49908144320.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076068a279d8---nojokawu.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/pebatenojutexupinitaza.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd8f134862---bupimamimopokapat.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/28700968318.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/kifes.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/prakejbvnd9vf70i4ofpstp4bt/50002945203.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c7aa363da65---41436389362.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/bigomeviwuto.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608303a82951b---tabulif.pdfIn PDF document text
    • https://coluer.ir/documents/file/51534371381.pdfIn PDF document text
    • https://vientangluc.com/upload/files/63758570853.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/d3c1efb5121df2fe339953f9f2b6bffa/42595291197.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/vumetexoked.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/59704833792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=write+down+the+empirical+relationship+among+mean+median+and+modePDF link annotation
    • 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_off00011000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11000 18684 bytes
SHA-256: 373f54fa7613ac7782b251e5e9f5cc56783543f323aa70fd8a6928817b6fbe82
font_01_sfnt_off000141ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141CE 11040 bytes
SHA-256: 4c0fd461cb8a5c22e05e3472bebbec437d18c408216b2415c69811232e91ca37

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