Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbaea48dec1ba8bb…

MALICIOUS

PDF

69.3 KB Created: 2021-06-11 10:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c6300081006ea5d9d3f3800bdc80549e SHA-1: a5cbba3525cc5f09ffef1ca467e432a89033d119 SHA-256: cbaea48dec1ba8bb4de57facb4eecdbfd5e32f6d3c3902b06ceab254342f3a32
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing lure or malware distribution vector. The document contains a large number of external links, many hosted on disposable domains, which is characteristic of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7003

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
  • 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://inwebjor.ru/pbw?utm_term=onlinemeded+whiteboard+snapshots+download+free PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4403414/normal_60b3e941eaec8.pdfIn PDF document text
    • https://milanabez.weebly.com/uploads/1/3/2/6/132695465/wimenixolabira-namoxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374374/normal_5fdd3329a9854.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4502833/normal_60b1cc07d3f3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_602767be407ea.pdfIn PDF document text
    • https://sitibopifug.weebly.com/uploads/1/3/0/7/130740553/6f986.pdfIn PDF document text
    • https://getawotenag.weebly.com/uploads/1/3/4/4/134443600/56d5b1d03f76b00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_603a44701e20d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_60b91073c1612.pdfIn PDF document text
    • https://lavivatum.weebly.com/uploads/1/3/1/4/131437335/rorel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_603db9b8de7fd.pdfIn PDF document text
    • https://jewizebalize.weebly.com/uploads/1/3/4/6/134618682/6519827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464871/normal_60b9a7af85ee2.pdfIn PDF document text
    • https://wejigawavopon.weebly.com/uploads/1/3/4/3/134305277/fomoxekigubukozil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414487/normal_5fecb13f20091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368758/normal_5fedc8534e495.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530868/normal_5fc80b67b6ac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_60bd4cf135397.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391327/normal_5ff144e54f80c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_60617c0acc00f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vesusezipuwe.pbworks.com/f/fortnite_hack_download_free_pc.pdfIn PDF document text
    • http://gutupum.pbworks.com/f/weathering_with_you_free_download.pdfIn PDF document text
    • http://fafevupu.pbworks.com/f/edit_photo_into_anime.pdfIn PDF document text
    • http://tijigika.pbworks.com/w/file/fetch/144793620/gamaded.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000103ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x103BA 5577 bytes
SHA-256: db65604f7c4d6f5ade55a6af3dd9ae93313b3bc79cb5ee9fd3efcf3ebdf3f57a
font_00_sfnt_off0000f10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10E 5540 bytes
SHA-256: 1d281a706febadff6c6031334d7ba8d9a2aac50628b13c3a498e8c98d0f635ba

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