Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaab40377e1d5613…

MALICIOUS

PDF

39.1 KB Created: 2020-10-02 20:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5c70e447ce7eca195759d25f620fce68 SHA-1: be07afc1811171b1643c783ae32547e73d6d220a SHA-256: eaab40377e1d5613c2ca627df1ac9faf2ef0090c336782d05ba61bce847c0623
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/strik?keyword=hammacher+schlemmer+projection+clock In PDF document text
    • http://gixodo.coastaldryhome.com/uploads/1/3/1/4/131453247/5808737.pdfIn PDF document text
    • http://roliwodem.differenttranslation.com/uploads/1/3/1/3/131383839/bewexatexesega.pdfIn PDF document text
    • http://files.phaysoneskincare.com/uploads/1/3/2/6/132680813/dc5b4b11c6995.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/4f2a0684-e3e7-4119-be09-b2cc55cd72b7/rowajejojidobawex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d7d2f2-9b9d-4816-9cf0-c77ee22a772b/20542315515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a421e10c-c9f3-4704-a559-21527d64581b/wisodugur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c096680f-7255-45c2-8128-bda0f7c027c7/wegenop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb3384a-06fd-4d69-a27b-3948b5a01cb2/14313040132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af821fa0-2f76-415b-9bbd-fc453527095e/kewopotod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be984947-9a08-4ad2-a042-935bdaa7ca19/rizilegom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a70c5d-fbef-4d1a-8063-a149efa14c0d/mutokevim.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_off00005a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9B 5276 bytes
SHA-256: 3be74f47665909b839214566a92affe93ac7955d8d4955e8bad774096927c28f
font_01_sfnt_off00006c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C59 10504 bytes
SHA-256: 8c59783dac892e4b3203db13ae0535c7feeb3a3284535909e0f772999f095c96