Malicious PDF — malware analysis report

Static analysis result for SHA-256 863f4f576c5b24ef…

MALICIOUS

PDF

48.5 KB Created: 2020-10-15 05:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 63f52881b52ddce31b9e0953a8099fec SHA-1: 66a2ae3b55807ef9c771c9acbe3337287a88c035 SHA-256: 863f4f576c5b24ef8e7655a08c61a98507b0afbe139b647c5cfc46f35ee4cdb9
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=chapter+4+study+guide+electrons+in+atoms In PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/javixanupudura.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/dinisepomuzejekeged.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/kulajovudazama_nobagikogisub.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/fewuvodexeweru.pdfIn PDF document text
    • https://site-1043603.mozfiles.com/files/1043603/5499493094.pdfIn PDF document text
    • https://site-1039899.mozfiles.com/files/1039899/furufiwaforeso.pdfIn PDF document text
    • https://site-1037859.mozfiles.com/files/1037859/47417404611.pdfIn PDF document text
    • https://site-1044417.mozfiles.com/files/1044417/14015049941.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/fb90b66957c.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wewebunovemerifabo.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/837cd096-a2bc-4e6f-9e6a-11f8e57ac442/zidufevipebav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0c7327-0d1a-47ec-87b0-e6506d8e6d82/zepilij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3beba135-a620-4637-aa75-2cf413aaf02c/17287654098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b97cf9-45b2-4fa8-9184-79977e2dad30/27676184612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1634/6007/files/phonocardiography_signal_processing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6399/6316/files/56403874324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6685/8408/files/tivavazasumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3074/0135/files/fujexabosegaxib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1425/0408/files/wow_skinning_guide_wotlk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1204a53-79a8-426b-b733-c51fb712485c/42413776157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d75ad40-24d4-4e5c-8830-988f5b0cab79/daxolaxuwirigakonibekero.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_off00007e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1C 5580 bytes
SHA-256: 1539b616b9e6905f6ca5688eeb895bd2197307dd217ac5bebbf405642d07edef
font_01_sfnt_off000090f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F7 10484 bytes
SHA-256: dcb9a2a0bcd1de89a7df4af24d753d6304271615827ec580d23961da8ae08cbb

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