Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba39be0e86f09bef…

MALICIOUS

PDF

65.0 KB Created: 2021-09-05 03:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 94a2b148366ed46fc2a63786c95d7af1 SHA-1: 48fde71c50022eaac4b945177f9195b7661a6ef6 SHA-256: ba39be0e86f09bef20ba6d043307efc93f9831a957233fd3dac4312bd5ca8164
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The primary function appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5479

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=difference+between+listening+and+hearing+pdf PDF link annotation
    • https://nmcs.ca/userfiles/files/gumasedokenulatosa.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/supovigurevuw.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/091952581218.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/datafogativakuwibopepu.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/94664267600.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/4551161264.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/be667a9a5dc17f9745d054d99cc1aacd/44557726114.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/78467727049.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021516157179278.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/laboxebafesukifidu.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/mejugawaku.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/19717183476.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/rasokufajigufu.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/8782184626.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac79346c6d---budosegoduvaralin.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08be329821---69568174492.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/jadavusopaxadav.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/natupo.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/75e01898f46ffb9d5d43886d58017b66/latadanigurofat.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c727cc03b3---nudajajoketugosolaxuj.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/t843u8nlv5o5vl5s62c1vvg16e/vibivufulijurezume.pdfIn PDF document text
    • http://airmon.hu/images/files/50670197279.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/47614090686.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f7d755cb8---6293321075.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/35b5403d1a6a04b7719888eeee9bddb5/zozunenamiwitupot.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/ligog.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD7 11004 bytes
SHA-256: cc46d24b0f90a322d28bb1051f233f6e7a590e6d7ad83b3d8b5c202f99ece59f

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