Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5a65390b50dcf0…

MALICIOUS

PDF

73.0 KB Created: 2020-10-17 06:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1809c54ba82f1cd4a670413f7a3f2d22 SHA-1: f72dff496275ee67aac4f0ccb74e530c22531a0c SHA-256: 5c5a65390b50dcf0d085c8a6f924f701323dc616d2d92e1d3c854e045e8dba0d
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/123?keyword=mbd+english+guide+for+class+9+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f8a0f5b9d762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f8a5ffd08334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f87548a41d12.pdfIn PDF document text
    • https://voledobaseju.weebly.com/uploads/1/3/0/9/130969813/6435886.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/c9440356.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/5386896.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/vetuwexirara.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/1/0481/6093/1991/files/32545943577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/4352/5286/files/suvirewenub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2435/0375/files/chemical_energy_and_atp_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe5c74d-908c-4bbd-9fa9-fe2a8ec38082/dimixulifokemujelavaxov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea268f77-b6ce-41a3-89a3-9bd14da741ca/zobulazefet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5437/0468/files/nubidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/download_manager_apk_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9944/5664/files/ruger_sr9c_weight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8076/4571/files/43592315473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2735/8115/files/reliance_jio_phone_3_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5aa060-defe-4b2b-aa38-70d5997a023b/litofifimajirili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c123236-fdef-442d-8c3b-6f5637b09ec8/kuvalojijuwula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c0640b-2032-4306-8ced-fb8c9888ab7d/gepisuxebavutolawevefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/936bb4e7-5118-431d-b46a-f132277f6806/68355117570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc7bfba3-f3d2-4fc2-b399-d4ac2028770b/biwowagamosolag.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_off0000d1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DE 5676 bytes
SHA-256: 7b2d2fe7470e319ef27c6e40455db0fbd10fa5bb859a516255bdbd7381135f85
font_01_sfnt_off0000e53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53B 15680 bytes
SHA-256: 9125dddb77732d7ce9c58730cd3d526c340d51116a6dbef8cbd5a9a41a060b8f