Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd46cbf723d5c712…

MALICIOUS

PDF

40.2 KB Created: 2020-10-09 03:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 3204efebf70a405303e21d1dda47bc2a SHA-1: 64c52df6bdbc8596a829de01a9f58c4e677a5ea4 SHA-256: bd46cbf723d5c71297f99c7fd34cbf31173c5d2c97876819c9060967124f85d5
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=face+glow+tips+in+ayurveda+telugu In PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/rilerowukorikewizusuv.pdfIn PDF document text
    • https://site-1038535.mozfiles.com/files/1038535/ponujogesewul.pdfIn PDF document text
    • http://files.opgsulog.com/uploads/1/3/1/1/131163751/1363967.pdfIn PDF document text
    • http://files.sisterspiritwomensharingspirituality.org/uploads/1/3/2/8/132815154/58853863.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/the_golden_gulag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4916/4693/files/oxidation_number_of_hno3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0436/1366/files/woladadupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56b74d4-514c-40db-aef5-0acd3d8c3ee8/55995038560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2cab725-8354-44b2-8648-7967b885fe37/serafori.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_off00005eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 5448 bytes
SHA-256: dd5b2ec747ba20f8528f6f781913591f8993aa05d39ec5d5672c046f9187900a
font_01_sfnt_off00007167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7167 10380 bytes
SHA-256: ef20886bed70fe9c4acc0a358166cf1cd75b1c492ef8cf8529f13d13fc610b75