Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af183c7917c7881…

MALICIOUS

PDF

43.8 KB Created: 2020-09-30 11:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 220dd725c257b991335fb0823460052f SHA-1: 779047c6160cdf15e791a3d8e793e0cef68538e1 SHA-256: 9af183c7917c7881db1d1cb651436e7edba73ffe71fc0bf33cfac80dd4141e5d
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=nationalism+in+india+ncert+pdf In PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/61483856899.pdfIn PDF document text
    • https://site-1036871.mozfiles.com/files/1036871/wejotovedavajaf.pdfIn PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/46382624039.pdfIn PDF document text
    • http://files.lighthouse100ultra.com/uploads/1/3/1/4/131437977/4727152.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/b168a27f-335f-4b12-8ded-1b60ec61b29c/taxabijok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f112accc-4063-4a7d-9068-5944f51f8a9b/rovewevavulomipolifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c13edb-63a4-4b61-ac2a-74c99f1a6026/wotanafipibidurisugepubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20fc46ff-0b9a-47b3-966c-3d1ca7d390a6/24889892337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ae7e2f-bab5-48f3-9a98-173179881df5/80049917281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/7481891947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3960/0021/files/lotakofuzowewutazosezol.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E82 5268 bytes
SHA-256: d2861931d7412563d62b1671d5bb1e0f5af858429412b6e66d4f8297c07f6d99
font_01_sfnt_off00008059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8059 9956 bytes
SHA-256: 07b2849f67d45bb1ee57fd0ccd313ab68a5ef85cd2284cdcf92dbea4a577338c

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