Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a43e61c7fe55b0b…

MALICIOUS

PDF

42.6 KB Created: 2020-10-04 22:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f4f3ccad9edda4fd7a6ee6127e9adaca SHA-1: 38c5a987110a70c559a9cf059b82cafec5bd06bd SHA-256: 6a43e61c7fe55b0b0551f9f708ee822770edf69f7008a52b4640b86ed8580ecb
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=gucci+mane+droptopwop+download In PDF document text
    • http://files.sportsindustryacademy.com/uploads/1/3/0/7/130739750/9510285.pdfIn PDF document text
    • http://files.pnmassoc.com/uploads/1/3/0/8/130814601/jalapovi_nagizeratup_xefogudorovom.pdfIn PDF document text
    • http://files.formulastudentusa.com/uploads/1/3/1/3/131398244/9135371.pdfIn PDF document text
    • http://files.doomedtorepeathistory.org/uploads/1/3/0/8/130814728/mozuvinav.pdfIn PDF document text
    • http://files.larsonjb.com/uploads/1/3/0/7/130739745/dapikijateruwav-futogizon-timobevaro.pdfIn PDF document text
    • http://nomif.cabinetsbycarlos.com/uploads/1/3/1/4/131406069/1655cd727d031d.pdfIn PDF document text
    • http://files.sunkissedbridal.com/uploads/1/3/2/6/132683000/8829397.pdfIn PDF document text
    • http://files.nlacademy.net/uploads/1/3/2/7/132740949/nuzefabasef_vokek_nubaxinib.pdfIn PDF document text
    • http://files.wheatgrasspublishing.com/uploads/1/3/2/7/132741181/ade259.pdfIn PDF document text
    • http://files.nastywomenuk.com/uploads/1/3/0/8/130813369/4c0718.pdfIn PDF document text
    • http://files.oportunityisknocking.com/uploads/1/3/1/4/131454503/4b551.pdfIn PDF document text
    • http://maravifo.sassyarabia.com/uploads/1/3/0/8/130874426/2567911.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0497/4739/4714/files/kidkraft_train_table_replacement_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6030/0442/files/wiradibuxetufikibaforofuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4564/9574/files/mophie_powerstation_pro_xl_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6117/2631/files/culpeper_county_public_schools_jobs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5749 3036 bytes
SHA-256: 356e021e7a7006eb0f33be76b92851191e680e81fdf745d3c082578eb854a5ef
font_01_sfnt_off0000645b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645B 5164 bytes
SHA-256: 68c79944eac9c854d2e15a6a71bd40417e6a5a1274414e6df4cdb1c1f82c96fa
font_02_sfnt_off000075e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 10908 bytes
SHA-256: f294fed09c98df45d33c073e177372a3f4458a005235350cf4f1200560c3d7b0