Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1323fb065a03128…

MALICIOUS

PDF

75.0 KB Created: 2021-03-13 17:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bfdc4106e5b0f453328cc601d70072be SHA-1: 20caebbe6d2c2cd40071c6fe18166b0489242738 SHA-256: a1323fb065a03128e156a0e960bb889ddfd09472f22c8769160f5a7867c98f08
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9182

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
  • 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://midufefew.ru/award?keyword=bullismo+e+cyberbullismo+tema+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414342/normal_6017ddd0ce4a3.pdfIn PDF document text
    • http://50offshop.info/70895584095gn504.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/latex_template_phd_thesis_computer_science.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_60343aeab4d72.pdfIn PDF document text
    • http://sweetmeet.online/12377885112w2yda.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/67142263760.pdfIn PDF document text
    • http://zomebosanetoviz.22web.org/spanish_food_guide_pyramid.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/rubibudujakuwujepife.pdfIn PDF document text
    • http://mon-compte-cmb.best/television_interview_script_formatwj6b0.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/busizunipepedakepibuf.pdfIn PDF document text
    • http://soldatskaya6.ru/41758966691srjbw.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/fezikamajesakaxoli.pdfIn PDF document text
    • http://brosbass.com/lemukuwiwewamr1i7i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_5fd9ae196089a.pdfIn PDF document text
    • http://gozenozidejon.22web.org/adobe_reader_dc_free_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_47c9e8f705f34bc1931cff080e435b88.pdf?index=trueIn PDF document text
    • http://desorebo.epizy.com/pimazikebuxeb.pdfIn PDF document text
    • http://vimeniwofeb.rf.gd/tawesudorenowuzalewodisux.pdfIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_1192d1c1a14447558ac760a3d72f9cb4.pdf?index=trueIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_8fa5ee12c76347c7befbfbbde2ac2392.pdf?index=trueIn PDF document text
    • http://julugupebuje.rf.gd/suxezesagijuw.pdfIn PDF document text
    • http://xedemigu.atwebpages.com/babette_babich.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_8ec9af7042684814902ab48850d29ae2.pdf?index=trueIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_fe4b775d7cb0459192de27809dfde015.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10729 5368 bytes
SHA-256: 93df2f6fec74094e9baee4114b9c61b67a7f451ded2bf905fefeaaba011cfd7b

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