Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b68596bdc947b1…

MALICIOUS

PDF

59.3 KB Created: 2020-09-30 11:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 65001c37ed5cbd29f3333f36ba9c2e97 SHA-1: 9e3f574c39563fcd3eb3472951ebf7a83d3f4a94 SHA-256: 90b68596bdc947b155aab8d1140923ca1424088237419a8f57d196fe18e11e58
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=biogeochemical+cycle+of+phosphorus+pdf In PDF document text
    • http://files.dougjthomas.net/uploads/1/3/1/8/131856771/pivikokisatoxobulak.pdfIn PDF document text
    • http://files.allriskinsmobile.com/uploads/1/3/0/7/130775659/eb90513641a4db.pdfIn PDF document text
    • http://files.polehillprovisions.com/uploads/1/3/2/6/132682441/1896289.pdfIn PDF document text
    • http://files.anteupphotography.co.uk/uploads/1/3/1/8/131871665/9172612.pdfIn PDF document text
    • http://bekufate.tyobirthcare.com/uploads/1/3/1/4/131406798/fuparatojuluxa-toxaxu-wipamuz.pdfIn PDF document text
    • http://files.mariacamera-smith.com/uploads/1/3/1/3/131383373/dexerukudedusumuriga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c2c033fb-8ab2-4dbe-9a15-ab4aa61d5f45/41947650684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52877093-005b-4a49-af77-c384f59cff42/pulopalidek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66fcb3dd-af11-4f5d-a2b5-701e80d205e5/25363334509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d76be2-4ead-4da8-a92d-ab97c1a4395a/lebujakumomiwonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70047ddd-2616-4402-aacb-6ce78fb35de9/11982206755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d4e287-a9f2-4c5c-a72c-34b47b657cb1/27185306229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c57d860-43fe-4d72-83eb-9f90c2854896/dazevobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b9780e9-c414-440f-935e-893015ae2370/79984206309.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF2 5416 bytes
SHA-256: 5091024a7d65b1c90f70b37a45f1f8c8660d520430b819abe20e9751d1163447
font_01_sfnt_off0000ae5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5B 10376 bytes
SHA-256: 7d7111a15c7a86437927df662f217b3604473a79ff6774124a0364d04fc73578
font_02_sfnt_off0000d18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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