Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2d0c54c0c8352e…

MALICIOUS

PDF

74.4 KB Created: 2021-09-09 04:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 379158ff0604e4264e9f6af9b65aab4f SHA-1: 4431456b42e568296ee0c6b771c13943eab82a30 SHA-256: 6d2d0c54c0c8352eb5f085a6d52c7d1076ce73e8e7564e783e04cafeef2ab1a8
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm or redirection mechanism. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the structure and numerous URLs suggest the document is designed to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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