Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e9afe1ea43ce2e…

MALICIOUS

PDF

41.3 KB Created: 2020-11-02 18:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9a8f6bf9c9576f3fbe270d2bdf949650 SHA-1: c8550a7862b76faf80c219d38f5fff7873653e7c SHA-256: a1e9afe1ea43ce2ed89bbf5fcdc53e7ec29b11fd7d09076479ccba8bbf2ebae0
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/aws?keyword=no+lewis+electron+dot+structure In PDF document text
    • https://bejivuvepezera.weebly.com/uploads/1/3/4/4/134437422/185428.pdfIn PDF document text
    • https://zijananuwale.weebly.com/uploads/1/3/4/4/134438714/dekowugosazumejopiwe.pdfIn PDF document text
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/waxuvo-merize-pegibopesuber.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/833c94af-cc22-4a13-92d0-098200813599/tabozubedowetofowap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9238/6997/files/lokowizalemuwawetawuxina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7367/3633/files/22840379411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9209/2091/files/budavivab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bac8a2c-8a87-46c8-9632-9a47001eea28/lixasusus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8503/0069/files/verbs_forms_list_v1_v2_v3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2545/5015/files/toxoxinukoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fffd96-e2f7-4eb0-8dd4-7775c9a7f5ee/fejajekukejetiposivukere.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/the_animator_s_survival_kit_by_richard_williams.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_off00006302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 4784 bytes
SHA-256: 81c962b8400f547269c6955e937a474e0e8bba28d8ced8ee7ab43c952482b180
font_01_sfnt_off0000736d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736D 10816 bytes
SHA-256: 13728036c93dbacdf91ec669645191706fa88171d334343c6d6c2aa5681df3e6