Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbecdafecd806ccf…

MALICIOUS

PDF

58.1 KB Created: 2020-10-10 10:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 757b1eecce08b880d0d346768775a77a SHA-1: 7c53d3cfea344be9dae15523a59c15714efb8516 SHA-256: cbecdafecd806ccfb1b9a454bd2f3fd6d028b73cd0d19cba4cfb234d5cd781be
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/strik?keyword=effective+practices+in+early+childhood+education+3rd+edition+pdf In PDF document text
    • http://wuruke.sacredhearts.ca/uploads/1/3/2/8/132815916/fusosenoli_zawikugorupo_basakejetu_penubojamazet.pdfIn PDF document text
    • http://files.capmt8.org/uploads/1/3/1/4/131438282/7953738.pdfIn PDF document text
    • http://files.lvcchp.org/uploads/1/3/2/7/132740836/2110658.pdfIn PDF document text
    • http://rusarol.drumsmithstudio.com/uploads/1/3/0/7/130776418/wujubexuma-wefavifip-fepibiki.pdfIn PDF document text
    • http://xeligo.suusigmachi.com/uploads/1/3/1/0/131070450/9674925.pdfIn PDF document text
    • http://files.letphilosophyshine.com/uploads/1/3/2/3/132302733/9843578.pdfIn PDF document text
    • http://files.middleearthferretry.net/uploads/1/3/1/0/131071298/nenoluvis.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://cdn.shopify.com/s/files/1/0428/8233/4883/files/process_dynamics_and_control_4e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9122/9349/files/46568947747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8210/8065/files/gixukivuxaxojetozel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/murloc_rpg_2_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/margaret_atwood_you_fit_into_me_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcedd633-6251-413a-a843-4f7b78419560/javariruzafisazikuzaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6450f4eb-9500-40b5-a892-6a45de4cb98d/dafuwubitexaxenijagivito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67564596-52b3-45a7-a69a-c07fbe910e87/33618461443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/464950eb-1197-4b60-9a85-2c5244f275f1/repelemigutudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c629a1-84e2-4963-a2dc-f7bc9f727e69/92740966256.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_off000096e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E1 5408 bytes
SHA-256: d0532f3427a2e9cdc245e96eaa43dfaaed03a6bc4022b7cf342f29ae473be1cb
font_01_sfnt_off0000a944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA944 10404 bytes
SHA-256: fa4afb77d6c4e5bc386cac131c6b3732a63325cfa5cee1d377e6b94c18dc07ed
font_02_sfnt_off0000ccae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAE 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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