Malicious PDF — malware analysis report

Static analysis result for SHA-256 461bb0fad8a7ab85…

MALICIOUS

PDF

70.3 KB Created: 2021-06-17 12:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bd1e458fa98b14745b2bdb0300100787 SHA-1: 66f21a7b7834e4fdbac2ed886dc206030b959f71 SHA-256: 461bb0fad8a7ab8593ad09ff54944ebe0cf931b2d1c7f9a69860559c37e5e204
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.8856

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://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ce4277ad7df03f3331841870ccfb6442/25601605706.pdf In PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/d419278b8bba5933411574e2475850b5/nadijavamege.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607997d86b875---48908727113.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/6783008908.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/85500805928.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/a115db8de1a54d2af28fb90c7ab20f0b/36513594242.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/af24sv7724tmq53g40aqnqk7k2/vewovigopugopodorobazo.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/fagobiliniderepe.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/eb355b04815a72df69d7127a406fe0ba/pivufofipegozedijop.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/suxadesarutubeso.pdfIn PDF document text
    • http://maihome.hu/admin1/file/89988557179.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c1c82b031---nodikeporewivirotozefapid.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085504dad6cb---33967256142.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210609_F2049C434A6E3506.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b3db58960a7---80341670542.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/ca7f7352c9fd7d52dbece4c843e526b8/jufusoletapa.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2154e8ef8---86958952849.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/d152fd6eeb395f08e9afce095a73e466/71891973715.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a44986fcc257fbc0084592d2eda0c53c/rakepizegal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=palm+swings+2017+free+downloadPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DC 5724 bytes
SHA-256: cedaec5d518298658943464fa6b2a145e95935809a9c9b6f5d8c9ed69707035f
font_01_sfnt_off0000e461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE461 2316 bytes
SHA-256: 1f4ab3dc7109b145c55e010206da44dc5b766b523135897298ed1d8498437569
font_02_sfnt_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 10752 bytes
SHA-256: 23ca96e4409e1ad236ca0b9a9d7830068e3168d53d24682da71fe41c99f799ae

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