Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f122ccf4d88a8d…

MALICIOUS

PDF

49.8 KB Created: 2020-10-06 18:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 998ec0b4764aae9e3e6732c5c2bce400 SHA-1: 9f1cf652f5324d68502cc32d2b616eff05c00f4b SHA-256: 32f122ccf4d88a8dd47cdee49e3cabdba566fddd9d1b079e87851b831fbfe75b
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/pify?keyword=pathfinder+grapple+flowchart In PDF document text
    • http://girar.peoriamedpeds.com/uploads/1/3/1/0/131070450/kudusurabizubiv.pdfIn PDF document text
    • https://site-1042734.mozfiles.com/files/1042734/nonob.pdfIn PDF document text
    • https://site-1039645.mozfiles.com/files/1039645/2983280783.pdfIn PDF document text
    • https://site-1039600.mozfiles.com/files/1039600/semunidizapikogojapomoz.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/622fbf6a-4abe-4de3-b4b1-f57a9809068e/99206010878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96640798-ce15-4acf-98bf-b03803c41b66/xijisuvimutanupetosidizub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa3339d-888e-42e7-bfe7-460d2745b1e3/sofesamaviribokamekaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2207c162-3611-486b-9205-6341ee7c6a0d/60764827849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db69f51-948c-4c84-8d46-890bbdf68be1/26407728912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7bb661-73b7-4fd0-9f7b-d905ef6cd020/pamimizagoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f9c4d7-f294-43b0-b0e4-eb9b5ff4a9be/31959443896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9643c2a-5486-46ab-a654-c644587b11d5/40492784306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ee789c-cf45-40df-b2e7-53f086533078/jafanu.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_off00007b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B53 5332 bytes
SHA-256: f95cc83ff5babca6668d47107d21cec7e11d102b8abc87e61dc67844ece43890
font_01_sfnt_off00008d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8A 14404 bytes
SHA-256: 1bd07720e3395d8cd38e4de927113b5f1b7f8da9b10aa22d737f6051ef9333d3

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