Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa506fd6c0e76944…

MALICIOUS

PDF

38.4 KB Created: 2020-10-31 01:52:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 7134560ea22a7d4f34110b47eadc48fe SHA-1: 7e6c3af34ef528689c47d6335bc455ad1ada024d SHA-256: fa506fd6c0e76944b387d93a205fce4ee01d9a16fb01acca896c34c0f2302394
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=nba+schedule+grid+2020 In PDF document text
    • https://lenololiwi.weebly.com/uploads/1/3/4/4/134455370/fodepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5f9c895353801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5f8deca7660e0.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/fofuwumok.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004922.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004922.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00007eb0.bin)
    • https://s3.amazonaws.com/vexeliku/capteur_de_temprature_d_air_d_admission.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/simulador_ser_bachiller_dominio_social.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/15796381680.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/69630634752.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/80590050547.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/videfawudusomevob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8529/7330/files/manual_do_satlink_ws_6906_em_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/apartheid_era_in_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6487/5925/files/stuparitul_tratat_complet_de_apicultura.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/catalogo_avon_17_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/concepto_de_bienestar_social.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 extracted file (font_00_sfnt_off00004922.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4922 5168 bytes
SHA-256: 54a1e31477ee20277413d75fa7a04634870fa03aacbca401e431cc326bdb9703
font_01_sfnt_off00005ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB9 10548 bytes
SHA-256: 76d803ded44afca937b17b7305e45a4dcaa45539b17541851b87b633a09a9d07
font_02_sfnt_off00007eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2