Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a2c9e85d3fe190…

MALICIOUS

PDF

72.6 KB Created: 2021-06-14 04:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d601ec7fdd0f4707aab6a25b20b3cde2 SHA-1: 127120bf3b09b877b8421e0183ef1ad56f3ead6f SHA-256: 09a2c9e85d3fe190ca4cf369733886581fa098f6d7c28c2eba11876197f45c3d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with a primary URL pointing to a suspicious domain. This suggests the document's purpose is to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://inwebjor.ru/pbw?utm_term=brooklyn+2015+putlocker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6024946cd660b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470699/normal_6006f4da36eba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488810/normal_6018ca3e19938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416672/normal_5fdb6f0758695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_601680e8888fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417025/normal_60c36fe0260ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497687/normal_60b842516ad09.pdfIn PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/rubaduzigir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445731/normal_5fe4fddf788a7.pdfIn PDF document text
    • https://nopovufarake.weebly.com/uploads/1/3/1/3/131379277/c018d0bf758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426699/normal_5fd132b83eee5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumedew.pbworks.com/f/jexotozetovofowugudigeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f4d0da-ad21-42c2-90b3-5aa12f6a936a/94459475751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e30dadf-738d-476c-8ce7-f3be19e0d0f5/how_to_use_brookstone_mini_projector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2588a6-a616-479a-b4ac-0cf68ed437ac/so_sad_today_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/687f25af-3322-4123-8e5d-e59318f80649/criminologa_forense_libros.pdfIn PDF document text
    • http://wikoborumun.pbworks.com/f/65675493961.pdfIn PDF document text
    • http://panugijez.pbworks.com/w/file/fetch/145251804/17911234828.pdfIn PDF document text
    • http://magogopowo.pbworks.com/w/file/fetch/144994419/happy_new_year_photo_photo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaec1b0c-4471-48f9-8a94-5e69708bc225/soxilufajuja.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_off0000dd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8C 5204 bytes
SHA-256: 5f2a066c43700f104510cd4618a420df7a75be1e431de90485fa1284ab9572db
font_01_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 11068 bytes
SHA-256: d9f6a4748396f2874a5c635da56c6988ebd81a2aae4c64261c3c4d0ac083f7d3

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