Malicious PDF — malware analysis report

Static analysis result for SHA-256 df880fe2b976ee1a…

MALICIOUS

PDF

75.5 KB Created: 2021-05-24 13:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 282c3e184f946fcb578715351c46eba5 SHA-1: 952f9771372c03e4afff17c67a20d25aa51f3263 SHA-256: df880fe2b976ee1a57db76b505a55593c3e0dff09ad858a66413a7b8999ce8ea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=braun+silk+epil+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390381/normal_603875dff3662.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469834/normal_5fe35c4326bdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_603acf5d01402.pdfIn PDF document text
    • https://jewafime.weebly.com/uploads/1/3/2/6/132681773/derowixatoja.pdfIn PDF document text
    • https://gusawinifob.weebly.com/uploads/1/3/4/3/134343307/vevasimewanenitudiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_5feaf19321c64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472221/normal_5fe64a93e4f2a.pdfIn PDF document text
    • https://vofirojaj.weebly.com/uploads/1/3/1/6/131637635/3340826.pdfIn PDF document text
    • https://zisovubuzuteb.weebly.com/uploads/1/3/6/0/136086112/441117.pdfIn PDF document text
    • https://jajelawipazug.weebly.com/uploads/1/3/0/7/130739535/wimosa-lozinixif-samotemisaro-vabawejibi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5ff8494ee0c83.pdfIn PDF document text
    • https://ramosekizopozov.weebly.com/uploads/1/3/0/7/130740175/suninoso-xomasupujubili-ranesap-zasodekokim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74970b9c-59e6-4101-bdc2-1bb5a99a4f14/ladies_how_to_shave_with_a_safety_razor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4ab877-0f43-41f8-bed4-e92ed727d448/what_are_the_benefits_of_working_for_apple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26597c6-3dc1-436f-9411-1606f7309f49/will_2021_be_a_better_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9538206c-00e0-4625-88f3-02002831b015/32544895418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0638947-db37-4ebc-9a7d-ef42150fe766/evaluation_cm1_gaulois_et_romains.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd783f3e-e715-44f1-b877-4c7647619427/orar_en_el_espiritu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c2163a-b3fd-481e-9b25-e27167c10719/zoviri.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_off0000ea93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA93 5240 bytes
SHA-256: e3cd5799a03e0dd4c28d1dcb19c19956fa66b19750e4685d97349f2db7cf3ee0
font_01_sfnt_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 10844 bytes
SHA-256: 42b23f721dfd35abc3bcdaa4f46fcdbc6d0bf8ba7f9e5742cef9811b4fa0d411

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