Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af1db3fe79b4fea…

MALICIOUS

PDF

92.8 KB Created: 2021-09-02 20:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 977ab33485854cbc06171ade3c51c042 SHA-1: 5f6d95eb0e038d9ba1e61774ba8fe7728f912593 SHA-256: 5af1db3fe79b4fea3aae4ef012dcd664bc882e154923769cb3d86cde9f94a97d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.3565

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://wastran.ru/uplcv?utm_term=diplomatic+immunity+pdf PDF link annotation
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b865f65b8f1---xewojapudimorazonikil.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088b77107979---poguzitekedoxaliwedugulob.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d246d94397f---fisumaru.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/3dtsqsnc5ni3c8un7kflcior91/16179536764.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-4/20210604145514500931.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161182fd8275f6---5589676513.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/nufefo.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/3703ea7809cf8fbe870c0fc136ff11f6/87153688265.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/48713545583.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/da99d883f65e3ea94f7819b4bf5e673c/61485430908.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/7461493095.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/kizuxebamanus.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/rajad.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16102c89d3e2c8---76727302085.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/op4i6mkjpqas9c55531bspjlvd/vedoda.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/zokilegakadisakewiziterev.pdfIn PDF document text
    • http://dges.in/userfiles/file/80445053899.pdfIn PDF document text
    • http://irs-messtechnik.at/upload/gujexunutikavudewenim.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/74125068223.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/nemawoka.pdfIn PDF document text
    • http://focostrade.com/files/20210620200151.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/duwikiduxobe.pdfIn PDF document text
    • https://lecachet.fr/docs/files/xorud.pdfIn PDF document text
    • http://zerosquareonline.com/file/saxuxas.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_off00011cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 18060 bytes
SHA-256: df7683b41ee1d3c2bc2f73cc139f88745af9e19a16dc4a921dbdd1fbd79fc5d1
font_01_sfnt_off00014ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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