Malicious PDF — malware analysis report

Static analysis result for SHA-256 351a201924fc9add…

MALICIOUS

PDF

39.8 KB Created: 2020-08-21 22:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fa1eb73b35e0f0140fda9d249973bce6 SHA-1: 7e3cc8c82f9629c4aca3a9766b83989ec0f887ee SHA-256: 351a201924fc9addbdbdb58889f16ef925c00318f217ae4efb250eb85cf5a6f2
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.ru/pify?keyword=albany+county+family+court+forms In PDF document text
    • http://files.mainstreetoptometric.com/uploads/1/3/0/7/130739789/doridanobugijejup.pdfIn PDF document text
    • http://files.walkaidscooter.com/uploads/1/3/0/9/130969712/9786676.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/1/0432/0188/8416/files/important_questions_for_class_12_hsc_biology_chapter_wise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/91490170955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6635/0998/files/gudibet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7281/1171/files/nidapigavukulibav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8128/5286/files/jefiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/anne_of_green_gables_ebook_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/favuzigenabagopoxuxavuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/6815040894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/twitch_sub_emote_tiers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/zurisedan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/vurulejoxana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/contoh_soal_tes_ist.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_off00005e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E13 5256 bytes
SHA-256: b703e158ec19dafde0e6220a8a81d9ec83262d30a1d1ba53caed34ea008a1dba
font_01_sfnt_off00006fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDE 10080 bytes
SHA-256: 7692e977b540ffb4d66c82d89cf798b6c37d26f59e1623d256363bebc41044f9

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