Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d4f759b731bc5e…

MALICIOUS

PDF

44.5 KB Created: 2020-11-01 01:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cd469cd5f2def4566b985f5a8a12b347 SHA-1: 605c61afdd4437df042a129313f44bcc96920910 SHA-256: e5d4f759b731bc5ec4a055e6fa8d6c0251327b2ef0d81e61a601f33497e81d8b
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://cctraff.ru/strik?keyword=kitchenaid+ksm2fpa+food+processor+attachment+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8773638eeb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f8a788f2f4b0.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/1/0502/3413/0624/files/nds_emulator_free_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4252/0231/files/spotify_mod_apk_download_latest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2427/4372/files/72677562483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2087/6962/files/gre_list_of_vocabulary_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7716/5741/files/84131282783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7440/2504/files/56256736319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab04ba6-244b-4b73-b50e-d040c06e03db/claves_de_cruz_roja_costa_rica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/lakeview_jr_high_bell_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c81f38-e18c-4965-b574-7a2229c12223/99514219827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2163/7064/files/bari_sax_finger_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6914/3708/files/katelupabeguvexot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7637/6477/files/use_of_library_and_information_resources.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a11dda76-61e6-4269-bfc9-c3ea37d6d3e2/kia_niro_user_manual.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_off00006e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E63 5560 bytes
SHA-256: aa7fcefae8b6d20b2702d11882633236fe281cb3182eeccf617875dde7d2aa0f
font_01_sfnt_off00008128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8128 10300 bytes
SHA-256: f5e0b7ee13ae8eedf5b0393fb2189d84085a229f1b07d8e51c11d4b03a2807fa

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