Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e4cbb550ffdc27…

MALICIOUS

PDF

69.2 KB Created: 2021-09-09 04:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a182f02bad7e7b2b60414bab774ad20b SHA-1: b30371e94420bee2c14b48843c2aadebbead15f4 SHA-256: 38e4cbb550ffdc27a902799a8367f05bf61b97fad4f666fd13eb0d15936ed6a8
94 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple external URLs, some of which are hosted on compromised WordPress upload directories. The ML classifier also flagged this PDF as malicious. The presence of numerous links and the use of compromised hosting suggest an attempt to lure users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6460

Heuristics 4

  • 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://philabc.ru/uplcv?utm_term=the+great+indian+kitchen+full+movie+online+free PDF link annotation
    • http://studioarchperissinotto.eu/userfiles/files/55493564795.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/47492404503.pdfIn PDF document text
    • http://moscowballet.ru/userfiles/file/13613328495.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/96778743126.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210908234953.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bdcca3cc2---11632731639.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/kawavupebukowizumiludekon.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/43611753891.pdfIn PDF document text
    • https://movingalpsfoundation.ch/userfiles/file/runusirirudutiresetazeku.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613619d212e2a---goxalizuraxitil.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/wakekekokikavomekizur.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/lodaranenesanowi.pdfIn PDF document text
    • https://kawanmto.org/contents/files/32838078230.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/28734007068.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/weriwikazuvitagemasavebop.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/xozasobomobatug.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/51319586451.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/0s8ihmvgqh8s09nkgpp555v0f9/zaloludebup.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/koxerebekofa.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/5d9500d8df12ea93a8c17e8e13e23af6/vatazoxas.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139631eea94a---kibovagazexuporarulobawir.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16137e8cbc071a---87369792171.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E0 10976 bytes
SHA-256: bd722fc88a766f15eb2d46a2d01e2385d3f488c263eb9f8e137210eed1bb532f
font_02_sfnt_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 17948 bytes
SHA-256: eb903308ba0fc797f1a6a999b02455f431f425e84a430fe4b425e9de5172c4df

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