Malicious PDF — malware analysis report

Static analysis result for SHA-256 3564f1083d11c170…

MALICIOUS

PDF

64.9 KB Created: 2020-10-08 11:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b9eb2c9835e7d00ce26f1c73e28db39d SHA-1: a1484a927a2cfe6182ce9e862b23a64dc825d9e0 SHA-256: 3564f1083d11c170d3a0aea2ff3abf3c735493cafba1f35e2f24c673505b262f
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.link/pify?keyword=do+ducks+fly+south+for+the+winter In PDF document text
    • http://files.alexisoneill.com/uploads/1/3/1/4/131410952/xukopujija.pdfIn PDF document text
    • http://files.unityofpalmyra.org/uploads/1/3/0/7/130775827/0d2098eedc2.pdfIn PDF document text
    • http://files.jingleexpert.com/uploads/1/3/0/7/130776493/879dda94.pdfIn PDF document text
    • http://files.bgmusagroup.com/uploads/1/3/1/0/131070113/pufawizazoborezon.pdfIn PDF document text
    • http://kisew.finnmarkexpedition.co.uk/uploads/1/3/1/4/131437595/lunetos.pdfIn PDF document text
    • http://wigepe.wakinikonaclub.com/uploads/1/3/2/6/132681396/7556731.pdfIn PDF document text
    • http://mamunemel.klintericson.com/uploads/1/3/1/4/131437987/tupeditoram-sovivaxi-sarivokebaxak-zavoforego.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/1/0437/8771/4721/files/ladifirimawawisigeponoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3152/3239/files/navy_evaluation_form_1610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3965/7631/files/bixadexakide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/relative_mass_and_the_mole_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/katejozefabaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5235/8039/files/permutations_and_combinations_matching_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6696/0293/files/zoxumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/name_the_following_covalent_compounds_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1917/2002/files/article_87_cisg_meaning.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA956 5156 bytes
SHA-256: 39baba52c23c817dc9f2ef300975afe5eb730a65cc000af0e90c4d55197c5b4d
font_01_sfnt_off0000bafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFC 11124 bytes
SHA-256: c53052eddca9f2aef7b63dbd1073c7751cf7503c4f2234d046d242bd2f6795e2
font_02_sfnt_off0000e107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE107 16232 bytes
SHA-256: 0865ea5686e30d19842a941efae749c2e92da649021023aa876fc32c67f43dd0

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