Malicious PDF — malware analysis report

Static analysis result for SHA-256 2acd9fe289b6443c…

MALICIOUS

PDF

45.2 KB Created: 2020-11-08 12:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 34b4f81b9cb377e102c90a13bf49cd1f SHA-1: 2211d6d00de34a4f734c3f116eca8a16061dc66a SHA-256: 2acd9fe289b6443c6e16b743caa4af91812550080bbe4d06a6ee9588ef94ed08
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://traffking.ru/123?keyword=dress+up+games+unblocked+666 In PDF document text
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/vefavapedipabopojofe.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/rojafetibawisuz.pdfIn PDF document text
    • https://fotekexilinita.weebly.com/uploads/1/3/4/2/134235887/satokaguramuj-kepagozos-wuxalojefuxebof.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/29a37f3502b2.pdfIn PDF document text
    • https://xebololu.weebly.com/uploads/1/3/4/3/134340913/6638352.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b7853419-4085-447a-8360-78e75a3163f0/imperialism_in_ww1_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed8df5a-48c5-4401-8917-086c7276a9c5/how_is_scarcity_related_to_competiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f79ec4a4-5e19-440b-bdb3-6b81a6237dd8/blackweb_wireless_headphones_manual.pdfIn PDF document text
    • https://wejogude.files.wordpress.com/2020/11/niwasegini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c205a5-56c6-4e68-90d0-fdacc85f0d9a/arquetipos_positivos_e_negativos_helio_couto.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/rivefom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c7c44f-410e-480f-895a-ce2222731f5f/surulubejifowufeleg.pdfIn PDF document text
    • https://viwatisoj.files.wordpress.com/2020/11/pefigakalirigafavakoxuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 5504 bytes
SHA-256: 26eb68d6fa233ac58dfc0f96818e0678133eb02f1386a284031c86e3c443c775
font_01_sfnt_off00007354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 12024 bytes
SHA-256: cd5a8c174a84ba95e8c69c5b12105f3c35fab98045dec6689c0973f2546fe46e
font_02_sfnt_off000099f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99F1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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