Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28e1de6af5f485c…

MALICIOUS

PDF

66.7 KB Created: 2020-10-01 10:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d03d11cb508c2c4b0a0bd623402f911a SHA-1: 336d11d71255cff67b4de4fe04eeb802a624c32b SHA-256: c28e1de6af5f485c5d1108b83db7788f3f756d9f007a1759c90c2bc7d788c8ba
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=attained+curriculum+pdf In PDF document text
    • http://files.orillialakesidedental.com/uploads/1/3/2/6/132681506/6736724.pdfIn PDF document text
    • http://dagoda.alisagrossutti.com/uploads/1/3/1/4/131438416/kunibo_sidim.pdfIn PDF document text
    • http://files.luisimera.com/uploads/1/3/0/9/130969438/diparofa.pdfIn PDF document text
    • http://files.mylendingleaves.com/uploads/1/3/0/7/130739664/nudosotalipog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zodotuxufaliga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/60913767867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7820/0743/files/xitasikajilewomefodafije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/8069/5207/files/cdac_exam_full_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/45964293705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/gukonizigalebofudus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9133/files/sokevibadekifodotuxisur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6693/2902/files/php_change_date_format_month_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/64921187924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/kensington_expert_trackball_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/58511974852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5745/8593/files/nenoxegenozowuferesutu.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE86 5112 bytes
SHA-256: 3d42940d72b787888a74e3a6199f4f563c31cec223c88429a51555a313ab3a17
font_01_sfnt_off0000bfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCD 6068 bytes
SHA-256: d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd
font_02_sfnt_off0000cf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7E 14904 bytes
SHA-256: f31b77e47d12cccbef5b3a72121f80b2cd3caa39e0b47d0a90c7cb9063ede410

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