Malicious PDF — malware analysis report

Static analysis result for SHA-256 8243e477d3041ce5…

MALICIOUS

PDF

42.2 KB Created: 2020-10-10 01:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4819f8d74649ee40e12a59900b99f6ad SHA-1: 5931ef4d1836e6357fc4743482350fb2b08675e6 SHA-256: 8243e477d3041ce58b6d79dc2e4cb5ab405f3d6784cc85fd6e4b588f50a74eea
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=nhl+pronunciation+guide+2019-20 In PDF document text
    • http://meluxuf.theheartofgolf.com/uploads/1/3/0/9/130969191/nabudetosabowotewaw.pdfIn PDF document text
    • http://jugopad.phocrystal.com/uploads/1/3/1/4/131406449/4320958.pdfIn PDF document text
    • http://files.nbmarysville.org/uploads/1/3/0/7/130739654/8708029.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/1/0481/8563/9061/files/elder_scrolls_artifact_chrysamere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0228/1123/files/66350710392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6271/3754/files/72323015103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4969/7959/files/92002825093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/nautilus_smith_machine_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a96d497-a687-4961-9f3d-66d472af3732/vonekirubinopuzilosalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8affb8c7-af21-4fe1-8df1-0645a5d20044/menazizade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b53e0f-3a3d-41e7-8ec7-31670ef35af2/51491242164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3baa231-930f-4a4d-b3e1-bc458c21f4d1/81799702693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b93a78-0a11-45b6-b115-cb1a576ad2aa/lukeseguti.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 4

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_off00006616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6616 5640 bytes
SHA-256: e8b8947dcce8a712eb5879dbf5bc3cc3991f21a9f21ad35568633df63983db66
font_01_sfnt_off00007951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7951 10108 bytes
SHA-256: aa56d13b056270be135b5f856b2a0f4f84296c318772d5931fab47d17ca7caa4

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