Malicious PDF — malware analysis report

Static analysis result for SHA-256 4efbb503b18a7716…

MALICIOUS

PDF

52.9 KB Created: 2020-10-27 07:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9e9c6dcab64939e4b6b229e9bd5aa4dd SHA-1: b3cf6162c95ecb9895aa1a69b0cb6698f782ddf8 SHA-256: 4efbb503b18a7716f5e16245ab9fa94195277b2273efa791489ee99be5e921c4
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://ttraff.com/123?keyword=lights+of+america+8045+manual In PDF document text
    • https://tefimapotile.weebly.com/uploads/1/3/4/3/134351392/1724690.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/7302442.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/polamajado_xowakujagurub.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/pewagelipogi.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/71b6f74c.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/namewuxo_jidebuxasez_wadotibokur_wubaxaketuzeni.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/piwevoxoririjipe.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/91d76533-8371-45a7-a59b-e989bfc6af55/darelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f0347e-a858-4ddc-b73c-75deaf6ae02b/61729387206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f78bab-cd64-4bce-b7b4-3a70afc31016/52947144003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4ec6cc-b3b8-420b-8783-91562fb5a47e/thermodynamics_an_engineering_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9371b13c-0621-4047-969d-d152f1fb763c/67098072036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b63864-1fc7-48f8-89ff-3e7d8ecc08fa/84868339798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2240/8087/files/list_of_sensory_descriptive_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1263/6828/files/fixiwasipaxotibup.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_off00008e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E48 5784 bytes
SHA-256: dcbae878d6440c858a8353d13335e82ffb284ea03092a63adde976de5771cc63
font_01_sfnt_off0000a1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E7 11020 bytes
SHA-256: 4707c51584446874a63c915f62429c6255923e043be1b6a7ffc2758665452cb1

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