Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3f05ee6cbd2790…

MALICIOUS

PDF

42.5 KB Created: 2020-11-09 09:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: bad34559d846835172f9921ff127561c SHA-1: 0b1fcc051877e68e38df6c565dd619005bd134d8 SHA-256: 2d3f05ee6cbd27902093e015d6566d10b530fe51f68962fe49a0b1c45367b275
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=video+editor+apk+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374359/normal_5f91dc0adcab8.pdfIn PDF document text
    • https://bozofuki.weebly.com/uploads/1/3/4/3/134322044/juporinasimixozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466676/normal_5fa81445239f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5f8f488813d0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_5f97a9b0007ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dixaleko/93090502138.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/acrobat_pro_dc_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/68051938349.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/duziruluvikaguvi.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/59816526854.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE0 4768 bytes
SHA-256: 18a1155dca9bf368b908fb8d83a826655595e1ed574f80464d79572e63473f04
font_01_sfnt_off00006d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D32 10124 bytes
SHA-256: 11271dfe7c9602c3d37dbc81199a292832bbf83544535bdbb369908f962412c0
font_02_sfnt_off00008f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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