Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7f739e199ba934…

MALICIOUS

PDF

34.2 KB Created: 2020-09-30 14:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3ebbe7505f71de728cb72d953e2d475a SHA-1: e2e2e0308461493e6b424aa160ce21895bd64119 SHA-256: 0c7f739e199ba934c896100c349991248f60204061bfe632c7ee8d4ccfad4da9
134 Risk Score

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.
  • 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=air+pollution+in+telugu+pdf In PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/vabalutatifonosaxef.pdfIn PDF document text
    • http://lejiku.leasidevolleyball.ca/uploads/1/3/1/0/131070187/f524f084ca2.pdfIn PDF document text
    • http://files.nutritionbylaurann.com/uploads/1/3/0/7/130775707/4723590.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/8081bfbd-eb40-43e0-acb6-85522e9a22f4/20031892476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c1e9c50-abf4-4b42-9bce-5ccdb416b115/filepexotikirarutotovuwow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ed3bfd-3906-49ff-89d1-e74c95ae8901/xozosolinaweva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4b5c8fc-8f3a-43e1-bea2-ed17f2e3d276/pixogud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8872/4639/files/56538619903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1612/6625/files/11712345642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0042/1790/files/72913377226.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_off00004a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A2E 4812 bytes
SHA-256: 656ef12445712b01179eaad91d8037bb55804f6fc44ad69e50ac9f7e86abdd86
font_01_sfnt_off00005aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA1 9980 bytes
SHA-256: 3f6ed32f4e369e0e2dca58d5c0c6084aefaf0a918140651eae79d5c8c1eb436c