Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2456e58aad4c72…

MALICIOUS

PDF

73.7 KB Created: 2021-06-29 00:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 484cd511095c485fb185914f33f32848 SHA-1: e713d2156b8f8789e6abb464e6004be5fa467721 SHA-256: ac2456e58aad4c72d7303df7de37097f5bff60766551ae608340cb2a6ac2799d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links to compromised WordPress uploads and disposable hosting sites, suggesting it functions as a link farm to distribute malicious content. The embedded URLs, such as 'https://huntic.ru/uplcv?utm_term=numbness+in+lower+half+of+body', are likely used to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7776

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://huntic.ru/uplcv?utm_term=numbness+in+lower+half+of+body PDF link annotation
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe5378a54d---jewiwifarari.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/wefoxutofenudebig.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/795363579aa734fec6fe19ae38306c50/moxovuliwereb.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/laxure.pdfIn PDF document text
    • https://2acontractor.it/images/file/susoxuxisamenozawu.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/zajomapilekirip.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/lezekoj.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/12246203465.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/mjaobln9loledbs9kpbf2m76m7/matovugep.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b12e070ef2---81452013934.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/lalego.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608492c2c92e3---13355358185.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/36913863854.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/depesalesawabuguv.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074a7224377c---nexasuwasoguligifib.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/16926693066.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771c43bd1e2---19762498954.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/jt6diagg613tnkrnsbgsoggr32/54480849957.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/6618fc1c08f9c18121dc8eba2060b068/26369249804.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/jenufabakojemetu.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/bb24cf3b76c22dbd9140924161cc97d8/mararodanujebam.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608eec3f7af0a---pewelirefufogukewofumuxu.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f0f7f61c---7228165689.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/tuvuxijev.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/19294038154.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_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1