Malicious PDF — malware analysis report

Static analysis result for SHA-256 df36687412e23889…

MALICIOUS

PDF

38.5 KB Created: 2020-10-01 13:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 037f6f20237b3c5c3120b0499b78a696 SHA-1: 87bed50ea1429ec11eba96f1285e0b9d6637144b SHA-256: df36687412e23889e4dc4206c90a0bbb20be16f2522f223dc6a55dd7ff0dba2c
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/pify?keyword=cooper+burbank+instagram In PDF document text
    • https://site-1038590.mozfiles.com/files/1038590/zumugur.pdfIn PDF document text
    • https://site-1039932.mozfiles.com/files/1039932/56513867366.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/22426269399.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/3054370691.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/2357093108.pdfIn PDF document text
    • http://files.theyintercept.com.au/uploads/1/3/2/7/132740204/8147562.pdfIn PDF document text
    • http://xasunori.reassure.us/uploads/1/3/1/1/131164250/zatupotozuwi.pdfIn PDF document text
    • http://files.basecampiceland.is/uploads/1/3/1/6/131606056/rutisejipu.pdfIn PDF document text
    • http://files.muskogeecreativesoul.com/uploads/1/3/1/0/131070525/wakukumusewifir_pesokekifun_pazodarozilux.pdfIn PDF document text
    • http://files.rioxpvista.com/uploads/1/3/2/8/132814067/pexebasemura.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/1/0433/1690/4104/files/71531891863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/zobami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/vijumaranafilukaziwonamir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2190/1729/files/fokexoxitarazono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/sopudodiz.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_off00005a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A62 5216 bytes
SHA-256: d0ffb2eeb74c28affdeece36e222b77b415e053aae53f331070edf98c11d03f2
font_01_sfnt_off00006c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C06 9820 bytes
SHA-256: 5bd922f8decc87487d9440dc387cefdaba835f47e0b1acc280e629fb46cbf5fe

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