Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d09fc2cf0bbf6ef…

MALICIOUS

PDF

70.2 KB Created: 2021-09-09 14:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0eb27d510138d64b30e9998f14b659dc SHA-1: 48d7fdc2ae9d8d3cc815120450a4f51973484879 SHA-256: 1d09fc2cf0bbf6ef9f6dd49a2138f4de5f710a93484589367b742b3c4aa91f0d
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The presence of multiple external URIs, including links to compromised CMS uploads and a link farm on disposable hosting, indicates a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4270

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krisoc.ru/uplcv?utm_term=god+of+war+download+for+android PDF link annotation
    • http://langmoon.jp/js/upload/files/58257946364.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/65934918540.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/fagap.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134ae2d52e1c---98292818594.pdfIn PDF document text
    • http://stisk.com/file/60012395882.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/92343892019.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/nejupuje.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/vadupevuzobipafeguvitetew.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/xikari.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/50985676146.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/9e8sllndgfav3dqkq43addafmu/92099735897.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/wifekulibediteda.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/ditezupapatedo.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/61380929054.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/loranidazovojelege.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138a76055f23---26063802996.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210905_945A0B07DA57AF4D.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109062138223853.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/jedeton.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebd8806513---69029900833.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/lf14acvcsaosp2gv7j65c32ppv/wikerufa.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/8046289036.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/likimu.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/bexabafize.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/59606336079.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_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 10076 bytes
SHA-256: c07b28546b03c6abb3f78d58543c5b8998202db7d6e83624336cf4e2d4219621
font_01_sfnt_off0000f5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1