Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe8c277a20dc5aa…

MALICIOUS

PDF

43.0 KB Created: 2020-10-14 16:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f26eb9442f6469f64f45edb6726b7a64 SHA-1: 74635ce58c3b88ecd05b9edc6614ca8f9917b147 SHA-256: fbe8c277a20dc5aa107c3c35bbaea3fa8fbfbeba07a6c10830fb1fa7d5668ece
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://gettraff.ru/strik?keyword=gunhouse+trophy+guide+and+roadmap In PDF document text
    • https://site-1039343.mozfiles.com/files/1039343/rexeju.pdfIn PDF document text
    • https://site-1036639.mozfiles.com/files/1036639/kofokuwa.pdfIn PDF document text
    • https://site-1038397.mozfiles.com/files/1038397/sopuwaki.pdfIn PDF document text
    • https://site-1037889.mozfiles.com/files/1037889/lakuxarizotedilizexedure.pdfIn PDF document text
    • https://site-1039289.mozfiles.com/files/1039289/86570572233.pdfIn PDF document text
    • https://site-1039427.mozfiles.com/files/1039427/bosapedunijoruxu.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/252309808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f86f4b859e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f86f4118e992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f86f4939a177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f86f5a4ddb6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f86f43ac442e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/2467/1907/files/realidades_1_capitulo_8_b_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8508/2008/files/dans_fan_city_tampa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/argumentative_essay_prompts_worksheet.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_off00006957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 5472 bytes
SHA-256: b9803b4e5a7803e4d7cb6975748c4280ec21de53048a76106205fc0b5b7ee7a0
font_01_sfnt_off00007bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD3 10192 bytes
SHA-256: d29294540a13e64f3dcbd04b58047b09f6af2173a62870e1326dcb88b5712458

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