Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b28638558dad678…

MALICIOUS

PDF

40.2 KB Created: 2020-10-27 05:12:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 6f07ceb07dd815ca44393af66e6223d1 SHA-1: 987ad1869a86b20fb5136ae466a560d93e676135 SHA-256: 7b28638558dad678743154c6a8b39bc7d4d575f5a8989d36557c849f4d8e4fb1
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://ttraff.me/pify?keyword=the+physics+of+heaven+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f8abd156e862.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/5102960.pdfIn PDF document text
    • https://ziridizozavixik.weebly.com/uploads/1/3/4/4/134400570/4b9b4ea.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/0a780.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/1/0493/6522/1535/files/xabopexazezutikid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7487/0689/files/76942960168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4542/8120/files/xvive_u3_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/govefaxejosizibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/sepegisadonik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6571/3055/files/37683079248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a90ea3-854b-43a8-9f2e-0e7020425247/circulo_de_quintas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d81e5a1-5a77-473f-9401-b5c6bbd3b7c1/4729813394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa006fad-2ffb-4718-b123-97b420375b87/cse_100_ucsd_spring_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5126/0353/files/luwononivukedadavik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/mudosafoxowigazepifug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8237/5864/files/barkers_shoes_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2406/2908/files/new_roc_city_ice_skating.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6727/3127/files/63731836886.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_off00005f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 5224 bytes
SHA-256: e173f2c3cc224c6e5d2d283661aa5339cc4eed04aa102cdd326d83fb06d40165
font_01_sfnt_off0000711e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711E 10204 bytes
SHA-256: 430a107499341546e7b9aa2a9be1b76eb1b0352aeefffadf8c7a3fb05d564460

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