Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c200c7c98a7f9d…

MALICIOUS

PDF

40.7 KB Created: 2020-10-09 02:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: cf4a34f5f84b3b34da7955fdc7d1812b SHA-1: c5cbc035f4dc94d245acbcfccdbedc5d6c4c554c SHA-256: f3c200c7c98a7f9d77d0a48fd5981300993077ca763b5b2479f884ee00dd5e1c
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://ggtraff.ru/pify?keyword=millas+a+metros+convertir In PDF document text
    • http://files.restorativejuveniledetention.org/uploads/1/3/1/4/131438571/ea989976.pdfIn PDF document text
    • http://files.lisbonfallsnazarene.com/uploads/1/3/1/3/131383380/8e5871.pdfIn PDF document text
    • http://files.dantramte.com/uploads/1/3/0/8/130813639/gurufujinuzusipikex.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/1/0431/9644/8917/files/24765949852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2003/6514/files/the_essentials_of_computer_organization_and_architecture_4th_edition_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5908/8022/files/cub_cadet_snow_blowers_prices_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0484/0096/files/nixirip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/mobodixowiganora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d128e56a-61cd-48f9-989b-9fa23b391d3c/pipiwunenitofudisetijesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49652e2-5dbb-482d-9e0c-30162056e7bf/xepalesalorinolitez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08c12ba-5963-4a61-a126-4e57fd523071/gigiribok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cab260f-c850-414a-9863-7b510ed22ab5/bizamajag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9615d26-04e0-4224-bebb-ae9689064dbc/95087655082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af43e90-1a36-4e00-bc5c-ba11620d779d/mubexesaviduxomimag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fa0eeb9-886d-423e-b07f-49fdb34e4a8e/sevapavidupuzijarowak.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_off00005ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 5008 bytes
SHA-256: 25bfdf8b5d863e18197fbf7f1b802275bccdbc07f09c720b5d60cda712e84f91
font_01_sfnt_off000070f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F6 10936 bytes
SHA-256: e9ffbcab178942c964e95d9b08ad27dfb27474371bfffc35dbe54f407de2d418

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