Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7017c59f5796331…

MALICIOUS

PDF

95.4 KB Created: 2020-12-08 18:23:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d30f0fd3bdc87a2188af40be941bc5ad SHA-1: 0bf874127a0dbd25de43f4bc6b5780c1ec1a1e8b SHA-256: d7017c59f57963319affd242da74e92bdc91e04acd00c1487327c0820fbff1fb
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=texas+school+holidays+2015+ireland In PDF document text
    • https://nometoxuf.weebly.com/uploads/1/3/4/2/134266561/tunojipidutupufa.pdfIn PDF document text
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/mebado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466662/normal_5fafd9ce4c47e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f898876172f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389568/normal_5fb497c9ae55a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5fbfa61cbe083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f908ea1db678.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/gadumagabusodel/b._sc_mathematics_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fd6c4e-fb86-4242-98f9-8ffdb137089b/8218542413.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/xelakigetefapibanozivuwu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ec955687f52b6b8145c1/t/5fc1d2eccb3e0f577193123d/1606537965261/instant_pot_aloo_gobi_vegan.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/39061999471.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB9 5596 bytes
SHA-256: 1c507e4d0b5cc39e760be26c6a284b61ab32e8bc89415fa32e3fb7e39c3c6b85
font_01_sfnt_off00012fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCA 5536 bytes
SHA-256: 5547de5bbe013dc536459d7d3407dae15d3ee1bf16237d414b71e3969abe967a
font_02_sfnt_off000141ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141EC 15176 bytes
SHA-256: 269735b5b4b0317e83bd2cf6076b90ec505e2f9f9284a9f5bcb0cdd00ea05518

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