Malicious PDF — malware analysis report

Static analysis result for SHA-256 230fd986795767a9…

MALICIOUS

PDF

39.9 KB Created: 2020-10-15 05:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 837d83c9086f37472453b3834ec34f42 SHA-1: 3a48fb792ffb2f6cb6fe6b49cd36b2a91a10e387 SHA-256: 230fd986795767a94b2d53d14ecaa23013d259c07f3a456a9a13277fd16d6a81
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://ggtraff.ru/strik?keyword=terraria+how+to+throw+guide+voodoo+doll In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/buwuvise-tufotubamizof-wajuduzado-bolejogebikig.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/nuvotuzopib.pdfIn PDF document text
    • https://site-1042432.mozfiles.com/files/1042432/45102360137.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/zenixujuxo.pdfIn PDF document text
    • https://site-1039487.mozfiles.com/files/1039487/giwoluxoxidofiv.pdfIn PDF document text
    • https://site-1042287.mozfiles.com/files/1042287/86392352083.pdfIn PDF document text
    • https://site-1041198.mozfiles.com/files/1041198/126595103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f86fd19da8a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f87a2f026dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f87082e9b1d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f872222b3049.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/34707762822.pdfIn PDF document text
    • https://site-1039565.mozfiles.com/files/1039565/download_brainly_apk_terbaru.pdfIn PDF document text
    • https://site-1039804.mozfiles.com/files/1039804/1552330424.pdfIn PDF document text
    • https://site-1038913.mozfiles.com/files/1038913/68553059375.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/65404465934.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/1/0431/9235/2932/files/84053201540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4628/0609/files/microsoft_windows_server_administration_essentials_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/0795/2039/files/9313267879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/xukenimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b53654-24f0-41b0-b551-bfcf520c64bd/49335179497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19457ab8-433b-4611-840d-bb7d90eaca72/47586291097.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_off00005d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D35 5012 bytes
SHA-256: 201f731794c131b328e1fb290f4eb924d74c861f4d6748503c125032f667624c
font_01_sfnt_off00006e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E53 10468 bytes
SHA-256: 9273b1c88fb5ba749265b54d7a45424413e88131476abd53fa314792c5b77c55