Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36b64f71983cc2d…

MALICIOUS

PDF

37.3 KB Created: 2020-10-03 14:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8581f0735e08f5f8ac06be4a97cd5297 SHA-1: ed3357f9877728ba9e6c1f200f82f339f7ecf35a SHA-256: b36b64f71983cc2d1e73f7f130733d90f18b4bd5fcf482eb1514ed1f2043a0b8
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://gettraff.ru/strik?keyword=coeficiente+de+rugosidad+manning+pvc In PDF document text
    • http://files.narinsedc.com/uploads/1/3/0/7/130776043/rofogatirogude.pdfIn PDF document text
    • http://files.helenissocial.ca/uploads/1/3/1/3/131379183/99072d8685a.pdfIn PDF document text
    • http://files.seedsofloveproject.org/uploads/1/3/1/3/131384424/rogarepugu-tazibije-wewivamuzifod.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/b6b73545-4a27-4303-91a6-dfc42054837d/42114388336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aab2421-193e-4794-81db-6f89622d1c89/66135647711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48938ae8-3e2a-433c-914f-3c862055baa9/gilakolomikomigafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/029ef0d9-36cc-4d3e-a7f4-054669d78734/xivujivixenafikomixun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04cfd7ce-f850-446d-a3e5-a82bf62c429b/musubikexej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c03370-c0d9-4fde-9452-acd552697b58/23954124201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b3e5e1-f32d-4b9e-9658-91baf134322b/zodojitorip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e2b1ad-c5f2-4f0f-a6b3-6e6526b4a47e/87155985704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d508af-091d-417e-adec-ec7cdfaf3b46/88120902256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533689a7-4cf4-438e-ba23-8b76f0c3d47b/73872985588.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000521c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x521C 5408 bytes
SHA-256: da14f940425647bd930d0de167e413485add1be6ab51547c781e8e69ad1986ce
font_01_sfnt_off0000647a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647A 10576 bytes
SHA-256: 2d88e9051f57e584bb0e14fb56232cbf90421f811068c6de2b9d3451c4453dde

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