Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd8f368f587406c…

MALICIOUS

PDF

47.7 KB Created: 2020-10-14 15:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 70c86591e7e91200d059cba8627be044 SHA-1: cdc167ce8e9fb15d75e780e5d62c37c0cdd61133 SHA-256: ecd8f368f587406c932f49f38c63fa9e0a62dceb89cb51b4f829c7b4e1e7c63d
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?keyword=s+pen+like+stylus+for+android In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3355978.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/b4b3eb38b.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.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/1/0432/7384/6952/files/71146353931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/maple_syrup_filter_press_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2674/6024/files/96020610753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abd3b1f-f401-4520-9a11-65938eb2adc4/jijezetebiwijagusafakasol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0faed0d1-2e2a-4567-bd3a-a716e4d6f1ef/nigatoxuvujetuduvivasori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3181eace-d85b-4e66-aa75-2240a36962ab/68996791253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3e6fcc8-0d4b-4fb2-a59f-51b348f559c2/jarajawanironajivekav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7f6110-2436-4329-926f-15a87b24bf23/6872221072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac5927e-167b-4664-93ad-07c40d72859d/68608566142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8aac590-69d4-4a6e-a1ba-11ceac0d73c5/33787017042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ce8800-2c65-4215-b232-b8078ec9b9cf/wanadavepezotuvaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e473c9bb-fcde-4850-afa6-5ebcf2cbd00b/67611483898.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_off00007bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAE 5304 bytes
SHA-256: b4be1574a8c43aa75c381f2327317ae904f02b79b90d68f523cedc050104968b
font_01_sfnt_off00008dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCA 10764 bytes
SHA-256: 84f33bd203ac6caea932588089df0b64aa8b0711dc890d335ee46c591539c808

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