Malicious PDF — malware analysis report

Static analysis result for SHA-256 520f5a212c47fcd5…

MALICIOUS

PDF

45.9 KB Created: 2020-10-10 20:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ba599175b23b03c23c03af0419de11ca SHA-1: 78a9d15e5d9abb3904a2afb848fb434374a57065 SHA-256: 520f5a212c47fcd5bf831b5e3c7da5d7718a3f6642fcb20a03aaf382918f3812
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=download+daemon+tools+free In PDF document text
    • http://fidat.wildabouthomefoodtravel.com/uploads/1/3/1/6/131636698/882930.pdfIn PDF document text
    • http://files.eatonandjones.co.uk/uploads/1/3/0/7/130776712/dufefitofini.pdfIn PDF document text
    • http://tavif.pezcaribemexico.com/uploads/1/3/1/4/131452976/4404440.pdfIn PDF document text
    • http://files.oostingsfurniture.com/uploads/1/3/0/7/130776416/nejovugu_zalurexafivutab_safumunutupuf_nakepanixiral.pdfIn PDF document text
    • http://sikuzi.magnoliawoodpool.com/uploads/1/3/2/7/132712348/sepujenerezime-mipek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5676/6869/files/nasm_study_guide_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5794/3206/files/43273907714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/majok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/lowepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/vevevopevaraximekos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113f1ecf-f771-49a2-8217-0f85b90f7323/82355220462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/316516f3-2ac0-41f6-9eaa-bf5dcf4cd0ee/wegumirazesopewuraxus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5f1a9d-34fe-4943-8d4d-a76918b0f6cc/14426158059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a11ac0e9-bc6d-46c3-96a5-692ce9fe0aa3/57153771451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a641f490-1130-4f0b-885d-a1911123905d/gefamok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a57d40-123a-42f3-9dfe-71e96f39732c/94299342127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c8f8ec8-424d-4cda-a561-f76a8da10d04/romojawul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b61a61ac-a30e-46c7-b68e-e514d1c1e19c/wijibo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6979 4884 bytes
SHA-256: 71dd535c3617e21ef132005c4951a81a12f6a51dcf3b42faff41dea0284d85f8
font_01_sfnt_off00007a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A05 9988 bytes
SHA-256: 585e73fcdc841002dbaeb6be4d421fec45a31810cb8809e1fc0bff85707545df
font_02_sfnt_off00009c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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