Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a8cb2f48b60ff8…

MALICIOUS

PDF

34.8 KB Created: 2020-10-21 00:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 28e37376a0d58b5e722dd517a3ac654c SHA-1: a43f3495f07826d074b56935af6b0009eb05d5c8 SHA-256: 09a8cb2f48b60ff8a40bf0f5c8700b2d1736502a2b3bd40d5c026314b86ac14b
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=panuganti+telugu+detective+novels+pdf+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f887d570b153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f8ea19843630.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/f5d445.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/5833901.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/4793008.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/9521918.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/2911471.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/melita.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/62f68a87.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/wuwoxop_zelatogib.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/lajofo.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/1/0478/8666/3846/files/colon_cancer_screening_guidelines_uptodate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2795/3312/files/wesiposezilona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2675/7786/files/philips_pasta_maker_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6079/7333/files/heat_of_neutralization_experiment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3474/5253/files/misodenajeruto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/world_of_warcraft_cardboard_cutout.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_off0000486c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x486C 5476 bytes
SHA-256: babcdb7b802d44d843a2ea15fc1d3f449eda4028fad4c7615f0082f217af9b3e
font_01_sfnt_off00005b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2E 10140 bytes
SHA-256: f99228c3c149cfefef66bdfe31faab1a22972044af80da7f02f127c6001e1c1d

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