Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe128bdc51c8122f…

MALICIOUS

PDF

38.2 KB Created: 2020-09-30 07:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 170292d4bb32444b36eb38f38b441fa2 SHA-1: d4b20ef1ed4a626e6c8fc588f096470a996c828c SHA-256: fe128bdc51c8122fb70814f6e24188f10e5f44f5baf4d7f11650f9a27523ab7c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with several pointing to known malicious redirector infrastructure and a link farm. The ML classifier also flagged this PDF with high confidence. These elements suggest the document is designed to redirect users to malicious sites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?keyword=piscicultura+de+%25C3%25A1gua+doce+embrapa+pdf In PDF document text
    • http://files.ponyexpressgamez.com/uploads/1/3/0/8/130874377/1390004.pdfIn PDF document text
    • http://jiboputo.thesterlingcastle.com/uploads/1/3/1/8/131856022/ruvewolejufopusi.pdfIn PDF document text
    • http://files.rafaelfraga.com/uploads/1/3/2/6/132683137/radazunorolamaf.pdfIn 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/1/0434/8759/2608/files/biblioteca_de_alejandria_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2595/4973/files/bukasesununabunulakevoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3600/8870/files/nuburavorope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1880/3607/files/sesunifino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2497/1936/files/41212801764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/gowozogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4219/3058/files/super_trig_powerpoint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/46787057263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8063/7859/files/jaspersoft_studio_vs_ireport.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2318/3267/files/u_mich_anatomy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5118/8125/files/panasonic_aw-_ue70_manual.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_off000051e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E9 5852 bytes
SHA-256: 1d33340cd5b518d5534b09f326c8a9bb37b065014b95263c8913e98e85851716
font_01_sfnt_off0000652c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652C 12016 bytes
SHA-256: 6987ac1905ec185460eaea3c57efa5079cb26a9744851543d8bc137019118dd2

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