Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba7898156b41474…

MALICIOUS

PDF

40.9 KB Created: 2020-11-09 04:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a2d63e1e42ae925fefe7782e34b03fe7 SHA-1: 7236a0f4a169a00d7d525602b865a8731551c4a0 SHA-256: eba7898156b4147407ce4b34fe788950ef4a9bf1d14a357a0078e6142d7a094a
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://traffmen.ru/aws?keyword=parts+of+microscope+labels In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420029/normal_5f962e77196a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408321/normal_5f9ef0080066a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f92877ed3eca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_5f8ffcffec1ba.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/3138913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5f976e78d6022.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/71370490163.pdfIn PDF document text
    • https://xewuripew660320655.files.wordpress.com/2020/11/fovagasadalimedav.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/fofaviwudademenupuwiva.pdfIn PDF document text
    • https://fegaretu.files.wordpress.com/2020/11/divigawosatubenilu.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/biotechnology_demystified.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/94482739104.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/magna_carta_worksheets_high_school.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_off000062ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 5300 bytes
SHA-256: ecaa283d87ab096d498174901aa6fee97ebcdcba94142103bcd7f6fe552f69c2
font_01_sfnt_off000074bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BB 10156 bytes
SHA-256: a2a33ae7ed91b23fca8d2dee382624ec2a33f89221f6cdb525b31e79ee194cc7