Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a4b90983f2b6ca…

MALICIOUS

PDF

35.1 KB Created: 2020-10-05 23:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4d816e6185eaf4f47577c40e196083c7 SHA-1: d4f78de0dd153bb29d38724b84b14d37b64abb85 SHA-256: e9a4b90983f2b6ca29a75baa9987b818da0868ccc329880531e2925b4c320d6a
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://cctraff.ru/strik?keyword=introduction+to+criminal+justice+by+bohm+and+haley+9th+edition In PDF document text
    • https://site-1039834.mozfiles.com/files/1039834/42841544517.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/kopubovinefoburonerezimif.pdfIn PDF document text
    • https://site-1040399.mozfiles.com/files/1040399/5814840317.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/63280851328.pdfIn PDF document text
    • http://files.coachharrisbiologywebsite.com/uploads/1/3/0/8/130814208/mutimoligero-ragezeg-demojidu-zubela.pdfIn PDF document text
    • http://files.dipconcaribbean.com/uploads/1/3/0/8/130814411/xulov-lekinosa-betaberijumi.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/583c1085-b037-405f-aa5d-a4b270d0601d/24640955400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af8dba0-fcd7-4ffa-b7d5-7101d5d875f1/pepukemumufulesoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/8338/2183/files/earth_science_lab_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7267/8054/files/roblox_games_unblocked_at_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0904/0803/files/beyond_nature_and_culture_summary.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_off00004978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4978 5592 bytes
SHA-256: 718f723e0f30aec3093d2518f56926b40ca08d78b65da21623157faa49f54f0e
font_01_sfnt_off00005c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4C 10356 bytes
SHA-256: 2eed808b1974c9128c243cae87e87b14b65e624c4163732cdefd925e8fee8f37