Malicious PDF — malware analysis report

Static analysis result for SHA-256 95314dae05e01ea5…

MALICIOUS

PDF

62.5 KB Created: 2020-11-10 07:28:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3f3e265bcdeab37080b949b7614fabf2 SHA-1: d04ded9cc24f2714bca92cb27bc2001dd7ed6b09 SHA-256: 95314dae05e01ea5f20092c08f7e7c4a8dc1f4acaa235d5b81782c4c1676e22a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment, likely leading to further compromise via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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
  • 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://traffset.ru/123?keyword=joanne+duara+md PDF link annotation
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/vejixinilezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_5f8c58877f415.pdfIn PDF document text
    • https://dedeluruxizo.weebly.com/uploads/1/3/4/3/134305162/9850662.pdfIn PDF document text
    • https://wanezetisozol.weebly.com/uploads/1/3/4/4/134468493/8276979.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/lefijugutofata.pdfIn PDF document text
    • https://gilolubirej.weebly.com/uploads/1/3/4/3/134309297/820f725e14f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/bekudiwevosafibufemudeda.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/55866237888.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/dk_bdo_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c25857-ca77-45c1-a42a-1d052c0c4346/xerox.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/59781653457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c66c577-c558-4801-bc5c-3cc0de7fc90a/mesamuxavi.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/natures_slim_keto_website.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA65 4752 bytes
SHA-256: 66c093c95ea7da93a82e79111c3a9ac59caea030690a87fa22a3889bd85e6379
font_01_sfnt_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 10236 bytes
SHA-256: 3b2f440d74922e5ee55299fb5654b97b80fc09689afb47cfb940a0bb4b93e887

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