Malicious PDF — malware analysis report

Static analysis result for SHA-256 23fa40b2e0a23ca9…

MALICIOUS

PDF

137.5 KB Created: 2021-04-01 09:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: df0a3d2226ae07ef8e0e29e2bdb43e2e SHA-1: 4491a87694b3f13ef5e34da1acde66e7622332d5 SHA-256: 23fa40b2e0a23ca9b76698f0270413158fb922563c15ece77b5235c6ac5b60a0
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, with a primary link identified as a malicious redirector. The heuristic firings indicate a link farm designed to direct users to potentially harmful content, masquerading as a search result. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/award?keyword=history+of+english+literature+pdf+drive In PDF document text
    • https://jozimowisefi.weebly.com/uploads/1/3/4/3/134331090/b5906f60eb2.pdfIn PDF document text
    • https://xiwabedosebu.weebly.com/uploads/1/3/1/3/131398066/bixidavodevota.pdfIn PDF document text
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/lokokajafozar-tupefofu.pdfIn PDF document text
    • http://zozezobakuk.iblogger.org/33037259756.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/hajgtHH/fimujupizexaful.pdfIn PDF document text
    • http://fuwipak.22web.org/child_life_philosophy.pdfIn PDF document text
    • https://cdn.sqhk.co/boremagu/jYhgKij/kugutilakumaxalerobegonav.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/eG5gfje/72676399001.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/71750059985.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/68062976356.pdfIn PDF document text
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    • https://s3.amazonaws.com/jijari/can_you_just_walk_into_the_dmv_and_take_a_permit_test.pdfIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_6c00fa18654a479d9c5e03ae71408252.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/how_to_tell_which_delta_cartridge_i_need.pdfIn PDF document text
    • https://82e7f058-9c2a-4352-8e65-a162d98cde11.filesusr.com/ugd/ba3c76_5c40a611683843fd9eb78c0662f8f27b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawovojo/kovenadiv.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_571174aefc644f959d7b687d3dd2d4d0.pdf?index=trueIn PDF document text
    • https://2df7536a-ab64-4dd3-a6ca-98e0eca144a4.filesusr.com/ugd/de578f_f82983b4d78b4ebb840c1b4ebdbfda76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuboki/succession_planning_template_excel_free.pdfIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_36a42b0059704a39a8a962d7553df2e8.pdf?index=trueIn PDF document text