Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede44c80d8893869…

MALICIOUS

PDF

40.9 KB Created: 2020-11-04 03:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e1ec33f981cae9929f59b7ce38140b3b SHA-1: ce19d7e80881b424f7db987a45cbd1e3839c6040 SHA-256: ede44c80d8893869e6f7ff1cfca42b02df7f4788d281d68d253c11d0fdba902f
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://ttraff.cc/123?keyword=jim+beam+suite+yankees In PDF document text
    • https://varivupe.weebly.com/uploads/1/3/4/4/134480773/fuwik_jubasixiri_fijadubagora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5f910be41c90f.pdfIn PDF document text
    • https://kitujimozudek.weebly.com/uploads/1/3/4/3/134375735/buzisezakagimi.pdfIn PDF document text
    • https://tokunebejuz.weebly.com/uploads/1/3/4/3/134323577/4566017.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/2120396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f9b39454ebe1.pdfIn PDF document text
    • https://falogumirej.weebly.com/uploads/1/3/4/3/134368081/xujin.pdfIn PDF document text
    • https://nugemezan.weebly.com/uploads/1/3/4/3/134359438/2145551.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/xisefowu/agua_alcalina_beneficios_y_contraindicaciones.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/56107847270.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/aqua_affinity_enchantment_id.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/desoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/824757497.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_off000061f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 5000 bytes
SHA-256: 7fae7d7aa2e4d7a78ef3e37efb27bc07f63c6eac7bf8ce6152a43cd89609a05f
font_01_sfnt_off000072f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F5 10600 bytes
SHA-256: 9989968198a76ee1a3e068d801cdd8239d2e3ac8b5959c38fc5e5680213e1489