Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bea6cbbc736a4b…

MALICIOUS

PDF

45.8 KB Created: 2020-09-30 06:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 698ed747719532c9d540ecfe96d13d01 SHA-1: fca47c644863e9b53a7c020c24acca6ddc342daf SHA-256: 58bea6cbbc736a4b0ba03e4f45306bbfe3df8adb9e3529f98795b7fa64d474ed
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://cctraff.ru/strik?keyword=bromination+reaction+pdf In PDF document text
    • http://files.campionjkirkham.com/uploads/1/3/1/8/131856076/vedinibuwiniva.pdfIn PDF document text
    • http://potudi.thewriteinstinct.com/uploads/1/3/0/9/130969432/fezeriredisibo.pdfIn PDF document text
    • http://jofusav.fruitsandrootswinetours.com/uploads/1/3/2/6/132695636/6738310.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/1/0428/9835/8432/files/72890356131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df99e4c9-6fac-46f9-ac95-da5448ed0363/36175931708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eaa3fc9-8506-4d55-8147-3a4ab53b13e7/tixenino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54e9b48-b92f-467e-ba99-0f22e52d7f78/37700839118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f767d4c-bc84-4370-a626-0a53232d3b71/33953821349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3371d753-74dd-40b6-b28c-a791b70a7bab/sinad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36955267-034d-421b-81a4-33202aa67a79/nezavosipulenevenosipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c1cf91-7e48-4d31-99b9-ef94bf44694c/wojiwuravisaxomokuwoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebcdb931-44a0-431d-b134-1d7bedd684ae/49655703256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242b18a7-ffe4-4bbc-a96f-35a892626031/43174544921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a2b691-2369-411b-afd4-ac84dce9328e/87611043044.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_off000076de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DE 5140 bytes
SHA-256: c45db8d33fcc61f8ddf622cc3e9036d678315bf86d28d2bb6ba2709ab3440986
font_01_sfnt_off00008844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8844 9988 bytes
SHA-256: ed68edcfb2ffa53552c31cae1d632ca7e8747deca5f3612a34cd3c912e6e146f

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