Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd33c32d0e8e4dc…

MALICIOUS

PDF

33.3 KB Created: 2020-11-05 21:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 1246a54adc10731e50f1ea6c1729757a SHA-1: a8f5706389f1c2d6c616669526d45c3f28edee1c SHA-256: 3cd33c32d0e8e4dc067420e1806921c569acc7ce4e1de8dd0604c5219b1f06a5
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://traffking.ru/aws?keyword=enchanted+learning+mitosis+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_5f8c7ef63406b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f8a6b8a9adfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5fa0bcde6557f.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/wirokuwofubonoderax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f97a211c621a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_5f95d7cb4720b.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/2258194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_5f959cb6237ca.pdfIn PDF document text
    • https://boxomuti.weebly.com/uploads/1/3/4/0/134016719/1590898.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/xufevopo.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/ef4899a4-82b5-4941-a089-341fcaf4d389/foguviruweno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d36ab9-9b6b-49b1-9a04-cedfa57df16f/zofuxola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a657944-0906-4ae5-b992-598948d9d63d/92332649156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2332d10-0496-4474-8cc4-b2b413a0b2d7/92238534332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af60a9fa-372e-4f19-820c-31df71d48ac4/arcade_pre_hacks_bloons_tower_defense_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/871770c8-3a68-4daf-a5e8-e884e5d84e5d/ikea_sofa_beds_2_seater.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_off000046a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46A4 5464 bytes
SHA-256: 1293e183481c1f7f8207ff062c852867e4215a8dd10147eef5666057df0756b4
font_01_sfnt_off00005926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5926 9088 bytes
SHA-256: 4b77493cdcfb312a8cb79c7b3b1b0444ee4ee90285801c7aee7005af3b932968

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