Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f40815a0459e99…

MALICIOUS

PDF

48.2 KB Created: 2020-09-18 20:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5e6ec9a9db204dd84749ab4dc9bd371a SHA-1: b263feb07aec906254b8be59c7110b6ad9b9b334 SHA-256: c4f40815a0459e99cff8adbaf5d0c99e0c6a4bf81347bcfb3282a161edc03ff8
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.me/pify?keyword=leakin+park+baltimore+map In PDF document text
    • http://files.helguhlidar.net/uploads/1/3/0/8/130814475/678f8c5.pdfIn PDF document text
    • http://sunova.toastellis206.com/uploads/1/3/1/3/131380213/1789472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://377ec45c-06f0-44ae-9f63-bd1389813361.filesusr.com/ugd/b1b16e_fd8c1cbb7dd44a01968f2ce65da7ebf9.pdf?index=trueIn PDF document text
    • https://fbbeaa0e-a2ea-4b0b-b6b0-b5f77c3273f6.filesusr.com/ugd/140efa_c745618c30e8481dbf993fe12b152b9b.pdf?index=trueIn PDF document text
    • https://35a4a87d-5d42-412e-be4c-6ebf08b84f02.filesusr.com/ugd/87b9a8_3a36d31707624854b53a0716cf70c5c3.pdf?index=trueIn PDF document text
    • https://a3ed6ff5-2b8f-4f94-9f35-c52253f40394.filesusr.com/ugd/952c2e_6715a89614d94447ace560fd6760fb6c.pdf?index=trueIn PDF document text
    • https://3345aee7-6289-4803-b14e-d8cfb1258570.filesusr.com/ugd/38062a_94c42c043498420495ddd455f0c948f7.pdf?index=trueIn PDF document text
    • https://fa009c30-23dc-4c5a-9c1a-4c3ac58f7e1a.filesusr.com/ugd/b5aed9_661aa121e8894cc0b32a9d4aa02135a5.pdf?index=trueIn PDF document text
    • https://9e31ffca-3014-4aee-b445-fe9610255015.filesusr.com/ugd/7e6083_3e66c65212da4b588596de482fbcdef1.pdf?index=trueIn PDF document text
    • https://c80dccc4-5bdb-4b9f-80ef-9557a4831651.filesusr.com/ugd/fef806_2d60e6f421d448c8856a7186eb4f4cb6.pdf?index=trueIn PDF document text
    • https://b9fc9117-9c45-485d-9f60-ed741a78653a.filesusr.com/ugd/3283b0_8d27a328b5904df79c6238f93b8a697e.pdf?index=trueIn PDF document text
    • https://a7b519c8-1429-4e30-9b84-e90d7d4e4014.filesusr.com/ugd/a4ea6c_43b20a470d214e3f88b09368255aae89.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7938/4731/files/87020071175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/27865861576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9019/6133/files/antiepileptic_drugs_pharmacology.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_off000080dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DD 4932 bytes
SHA-256: e07006c5d4c7ce8f8727c9fa01090b19f7e0ebb5b64052332abdb51067f6698c
font_01_sfnt_off0000918e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x918E 10172 bytes
SHA-256: 3ce70c1f389937a995c9811637d97276e9a33ac85442cec8ab5736f25c4f1cd0

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