Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb52cce682bd09c2…

MALICIOUS

PDF

45.7 KB Created: 2020-10-18 02:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 84444a8541927d8059429f7f2027a909 SHA-1: 4167bfb4ecfc0edbfae9fce46766d9f7a54f9370 SHA-256: cb52cce682bd09c2c41e3d4e8018dfe2a2146aecf380bd7862b35b56bf2bf4d0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ggtraff.ru/123?keyword=present+simple+present+continuous+exercises+pdf+b2 In PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/fosaravufe_donimomes.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/0cbd7f35736ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f8a7dc646c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f87c51586de4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8a856d9deae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f89db15224f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f8b5f4aa1eae.pdfIn PDF document text
    • https://raxiruzaxulam.weebly.com/uploads/1/3/0/7/130738564/8648307.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/gavuku.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/jibigamefomoni.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/pululezadudin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f8b5d41d24cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f8a41729214e.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/462bc7f1-d5ba-4cf3-a59c-254d974cabc1/wabinixotejowexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96879e7-4625-48cd-a5f6-0d4397c6f5c3/69885391572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e38e9c-7608-48ba-9c64-776f82e28655/57981010197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba837f2-c224-4922-ac71-3cd79a5dabdd/mixelovizusizulupero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce228d92-47f8-41b4-bf82-ad759cfd7a71/julalime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9474/8573/files/free_association_writing_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0185/0273/files/archer_city_isd_school_supply_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6957/7637/files/21193423719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7779/8554/files/bose_soundlink_speaker_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3086/3259/files/16997532710.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_off000073ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF 5432 bytes
SHA-256: 5a528f0882204743f40a303eb76580f6ee72e723c2dfea0abd76fe7d0de364ed
font_01_sfnt_off0000864b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864B 10072 bytes
SHA-256: 521592a45d4cdea3a4beeba8abf8b13aafe810f38288a16b94852220fcbd9fdb

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