Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e70ce04d2fb0b7…

MALICIOUS

PDF

77.4 KB Created: 2021-04-06 08:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5e1cc847fa19fb8ff29cb65dc24a3bc0 SHA-1: 06f8e820d195c50d55baeeb04bfffa4ad5a9e399 SHA-256: a2e70ce04d2fb0b70ce0de5520b3da4e115913b662994d180f7ea2657334ed29
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by 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 0.8823

Heuristics 4

  • 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.
  • 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://nipisod.ru/strik?utm_term=warforged+acronym+names PDF link annotation
    • https://mosazipabefo.weebly.com/uploads/1/3/4/7/134735261/3936356.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/2029245.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/kazexifunarotopi.pdfIn PDF document text
    • https://ligonulijer.weebly.com/uploads/1/3/5/3/135318365/fasuziweropidokujudo.pdfIn PDF document text
    • https://jimiduwukav.weebly.com/uploads/1/3/1/4/131452794/libekefu.pdfIn PDF document text
    • http://tejidirexe.mywebcommunity.org/base64_encode_file_online.pdfIn PDF document text
    • https://xojolulodi.weebly.com/uploads/1/3/0/9/130969725/8059394.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/struts_hibernate_spring_tutorial.pdfIn PDF document text
    • https://minazunanuvisim.weebly.com/uploads/1/3/4/6/134666394/viresofasizez.pdfIn PDF document text
    • https://lopifonexebifi.weebly.com/uploads/1/3/5/9/135986218/wemodomoti-pizupup.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/5989873.pdfIn PDF document text
    • https://taduvovu.weebly.com/uploads/1/3/1/8/131871704/vumifuneg.pdfIn PDF document text
    • https://nodefosodetapa.weebly.com/uploads/1/3/5/9/135978328/2156744.pdfIn PDF document text
    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/dikarawalexuji-xikodajubumevit.pdfIn PDF document text
    • https://femixazate.weebly.com/uploads/1/3/4/3/134363246/1af2266ef.pdfIn PDF document text
    • https://ruwixotuso.weebly.com/uploads/1/3/4/1/134131383/fa78868374728.pdfIn PDF document text
    • https://futisukafasuku.weebly.com/uploads/1/3/5/3/135345320/mepuzawi-gelanadigaju-xekasevodufag-bitajutovifiri.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/xakaxafapi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/vesorabitejebanixeta.pdfIn PDF document text
    • http://donufuruwitij.atwebpages.com/had_better_should_ought_to_exercise.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D09 5424 bytes
SHA-256: e082c359537a99f9c597a93b471838f62009ab13438af16f3ff70dd0f5422609

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