Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6984ec5cf837d3…

MALICIOUS

PDF

38.9 KB Created: 2020-10-26 14:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 2e05cd339249236b331af5c163d05498 SHA-1: 9747f8abe038d3333cfc853934de5730242d3345 SHA-256: af6984ec5cf837d30fc0da8f3c2d1a9ec2622cc9e30d0eac57b0f49c2d9122e6
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/aws?keyword=5th+grade+math+vocabulary+words+and+definitions+pdf In PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/979646881.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/8a68c5dc19.pdfIn PDF document text
    • https://delujopasetew.weebly.com/uploads/1/3/4/3/134399242/a80df0.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/973a38457.pdfIn PDF document text
    • https://jawokipuroz.weebly.com/uploads/1/3/4/2/134265350/sikeririjarewelirisi.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/5068852.pdfIn PDF document text
    • https://fipuvulozubonoj.weebly.com/uploads/1/3/4/3/134313175/4ac72ec55aee.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000056e0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000056e0.bin)
    • https://cdn.shopify.com/s/files/1/0462/9918/5312/files/wmv_to_mp4_converter_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8124/4573/files/davonisabolusalafined.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3938/1433/files/soben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/cours_hydraulique_industrielle.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/jpg_to_word_converter_online_free_i_love.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2924/9179/files/golf_clash_cheats_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6225/4488/files/41943210134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5155/6260/files/dapogebasodap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/syndicated_deal_analyzer_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/69213352425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eebcbe22-f87d-48e3-b405-a6241abbdcdf/mixigesukaguvozoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6bff419-6768-4fd4-89a1-f464cd0ad97c/21997769110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ff4d5f-3d1b-4bd5-8624-2e6d51c22091/72018453338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ace9af-5620-4363-9faa-96d8c8894b74/40661086644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8baf8d04-ec87-4609-a091-8bf92e04da8f/woxafigobevus.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 extracted file (font_00_sfnt_off000056e0.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E0 5992 bytes
SHA-256: 58b849dd9b16636a2dda2733defd51203f23cc07bd51a805ae1468f2b87ff0aa
font_01_sfnt_off00006b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3A 10080 bytes
SHA-256: a8386d88bfe61d9b76cfcb916d48b6a332c0292fe761724db6bc3265a0660f72