Malicious PDF — malware analysis report

Static analysis result for SHA-256 db649893830be80c…

MALICIOUS

PDF

72.1 KB Created: 2021-06-05 00:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 24d765144b31aa72cf8fabb939b3be21 SHA-1: 8c669c770d76ef6f027cfb615a5bda8a85d492e5 SHA-256: db649893830be80cc7402051abfae141999d7f249b31ed1311224f5676d76b03
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. It contains a large number of external links, suggesting a link farm or phishing attempt to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate a malicious intent to distribute or phish.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://pelibifir.ru/123?utm_term=american+college+of+chest+physicians+copd+guidelines PDF link annotation
    • https://dofetavazazu.weebly.com/uploads/1/3/1/0/131071127/43f76.pdfIn PDF document text
    • https://gijidibeb.weebly.com/uploads/1/3/4/7/134702067/fizuvawuvuzozat_rerolako_digozasini.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4373240/normal_60b24066d093a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5fec6472aafc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386591/normal_5ff66a5735f03.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/3977429.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/552401953060f6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5ffc737da4d25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_602e564824fe3.pdfIn PDF document text
    • https://risibazizugati.weebly.com/uploads/1/3/4/7/134710005/7acb50612cac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_60224d51ee0e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_6037be229bb65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_60469b33e563d.pdfIn PDF document text
    • https://lonopowixeza.weebly.com/uploads/1/3/4/6/134620564/dunatibiniwuvuj_jolegof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453891/normal_5ffeb83a28d61.pdfIn PDF document text
    • https://getesuvuroxabet.weebly.com/uploads/1/3/4/4/134403663/4798870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444869/normal_600a593f391bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379471/normal_5ff171660e519.pdfIn PDF document text
    • https://lolidinol.weebly.com/uploads/1/3/4/8/134884516/33cd45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144620043/kala_patthar_hindi_movie_full_hd_amitabh_bachchan.pdfIn PDF document text
    • http://bibosopimugo.pbworks.com/f/descargar_windows_7_ultimate_32_bits_iso_utorrent.pdfIn PDF document text
    • http://wotasaful.pbworks.com/w/file/fetch/144630309/jojepikaledazakewewanewiw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 5660 bytes
SHA-256: f16628df28db133b35b082c915571e3bf57ed65be8857c9419191163a9ec21fc
font_01_sfnt_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 10408 bytes
SHA-256: e446541c1021401c45ffdd6ea486307d5af2e9243946a342e3129adf214af199

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