Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd662992eeae038e…

MALICIOUS

PDF

40.1 KB Created: 2020-10-10 22:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f8d14715853cf58d9a6da08babbbb905 SHA-1: 83974b3e69ab7942a084105243fd4f738a27dce3 SHA-256: bd662992eeae038ecfb6acdce688ad31a9f06206038394c2cc4166ca4efda769
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/pify?keyword=how+to+draw+in+microsoft+word+2010 In PDF document text
    • http://fikogod.immokaleeband.com/uploads/1/3/1/4/131452903/4950480.pdfIn PDF document text
    • http://files.wonderful-marocco.com/uploads/1/3/1/8/131856877/3776445.pdfIn PDF document text
    • http://mitejili.prcawa.com/uploads/1/3/0/7/130776699/6528032.pdfIn PDF document text
    • http://files.oldsouthart.com/uploads/1/3/0/7/130739024/winefu_mifosefab.pdfIn PDF document text
    • http://nuxumuvir.babyg-lash.com/uploads/1/3/0/7/130775583/1617803.pdfIn PDF document text
    • http://files.lucindaquilts.com/uploads/1/3/1/3/131378838/zelevela-pogutoriro.pdfIn PDF document text
    • http://files.mogsu.org/uploads/1/3/2/7/132740214/rofurulu.pdfIn PDF document text
    • http://files.marblefallslibrarythrift.com/uploads/1/3/2/3/132303189/8926933.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/1/0494/8872/4127/files/loluxafabuwonamuvulevume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3625/2072/files/xatovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7290/3578/files/oi_and_oy_words_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6146/9596/files/fifty_shades_of_grey_movie_online_netflix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2525/9944/files/66297801438.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_off00005e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E66 5512 bytes
SHA-256: 378c17a8bcc4e34839a732df469b98fe56c94cd02841b5de67ae4af3f7a0956b
font_01_sfnt_off0000711d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711D 10012 bytes
SHA-256: a39dcbc23d22e001588154d209c3f58f62dfd6979f98708ad3b48a23de5ec768