Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a072353843fbb31…

MALICIOUS

PDF

55.2 KB Created: 2020-08-07 23:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e0e7fcdb729989debafd261dad2e22e7 SHA-1: ba3e5e7de9d93bfc6f36707b5bd8fd7984998b95 SHA-256: 4a072353843fbb314ce2a1fa9a896f158a8e045cdf534aef5ef56f40266278ee
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.com/pify?keyword=side+effects+of+antidiabetic+drugs+pdf In PDF document text
    • http://files.brushworxstudio.com/uploads/1/3/0/8/130814644/fuludu_suwajinexuna_dejak_noxojakajavaxe.pdfIn PDF document text
    • http://files.godsredeemingloveintl.org/uploads/1/3/1/3/131380343/ronufamug.pdfIn PDF document text
    • http://files.juliathepotter.com/uploads/1/3/1/4/131453348/zajof_kituzatukuzaku_tubumax_nuvajisak.pdfIn PDF document text
    • http://files.heebeegeebeehealers.org/uploads/1/3/0/7/130739340/de305.pdfIn PDF document text
    • http://files.keeperswesternstore.com/uploads/1/3/0/7/130776573/riduxijuketuraribake.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/1/0431/6987/4082/files/37012109058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/2794464060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/elliott_jaques_requisite_organization.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/53145582270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/rivivebasereriperukogefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/denedawijamewuvuxeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8394/7414/files/satamevofepawiwojorutuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2010/7428/files/kojolajejazewewifuvatopof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/lefozedekunabogasuvefipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7971/0360/files/zojebatasiduriwopoxow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/printing_business_company_profile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/21096128159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/caged_guitar_chords.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_off000091f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F7 5532 bytes
SHA-256: 1b253eea64bac29e6e03dc7d61122dc2f8cbb8f63ac903f3f23200acd7232d82
font_01_sfnt_off0000a4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D9 13320 bytes
SHA-256: de9ea846a422d5e25ffea6fb07692c78f3cff31bc6412d30e472be057c56715b

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