Malicious PDF — malware analysis report

Static analysis result for SHA-256 57229a3b4772460c…

MALICIOUS

PDF

41.2 KB Created: 2020-10-02 01:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 95494f3e8994f36fdd65b7ec2945f3f2 SHA-1: cbee0d1a32faca931820a84facfa16619ae2ce0c SHA-256: 57229a3b4772460c70be5b38556323f6da28e5fb42e7b82ca19ff79f9d883cd4
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://gettraff.ru/strik?keyword=identifying+cause+and+effect+worksheets+for+grade+3 In PDF document text
    • http://files.in-touch.org/uploads/1/3/0/7/130739155/bivago-pebojutajo.pdfIn PDF document text
    • http://files.calgarymemorial.com/uploads/1/3/0/7/130775784/5633077.pdfIn PDF document text
    • http://files.nanaimokettlebell.ca/uploads/1/3/0/9/130969097/947882d1c844.pdfIn PDF document text
    • http://files.worcestershireciba.com/uploads/1/3/0/9/130969576/vosoxekigotep.pdfIn PDF document text
    • http://joriweki.myomovement.com/uploads/1/3/1/3/131398140/vafoxoxanamopu-dukamoge-vafiremakanuxu-mipog.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/1/0496/0786/8579/files/71261530648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/5624/2344/files/2012_bad_boy_xto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2240/0674/files/waterfalls_in_kansas_city_mo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4147/2159/files/20504563551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3153/0138/files/daloradius_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9af5d0-50ae-47a4-b12c-24f6164fb940/6436850356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0614a83a-b893-4f32-bfcb-2b87be3fc19e/99114197084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c46a61-588b-4013-b370-15dd6eda1e5e/xijexoxukemotosamamovipog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d9853e2-13b9-4e00-ad85-5b3ea4b31924/10714171482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2019c7a0-4bdd-4369-9e77-0d92061961db/49462491315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c236fa16-254e-4114-b0d2-44de3e2f86c6/42864571994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd09e6c-19aa-4425-8d2e-bef56a53751e/tevejuvasiguro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e001bda-8fe0-43c0-9b1d-5f10bd020eda/zarezoxudedivo.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_off00006213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6213 5612 bytes
SHA-256: 9c309be95eda1e82a2c55f8f4c858b07f998e1107afd0440845f9e2d02312585
font_01_sfnt_off00007550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7550 9968 bytes
SHA-256: bbc4929dac7e051c2d2bfc9ae8bfa74d34ed364371044541c4bf2e90c3f76c60

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