Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4ee0046e2de6cc…

MALICIOUS

PDF

42.9 KB Created: 2020-10-07 15:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ad32ec8f29fc09b630ff44cdb4ef46ab SHA-1: 3348bcebea4fb1d9b1cdc92d05b7adc06f03d60d SHA-256: db4ee0046e2de6cc29df60296baefef53b07483fda88b96a37bdf431ce1d8e30
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://ggtraff.ru/strik?keyword=disney+flute+sheet+music+pdf In PDF document text
    • http://sesivux.kingfisher-strategy.com/uploads/1/3/2/3/132302868/9874854.pdfIn PDF document text
    • http://zepisixos.bridgesidebooks.com/uploads/1/3/0/8/130814788/433ba98381ec43.pdfIn PDF document text
    • http://files.makingyourlifecountradio.org/uploads/1/3/1/6/131637024/wupumubo.pdfIn PDF document text
    • http://files.warnersroadtrips.com/uploads/1/3/1/8/131856649/lakosisej.pdfIn PDF document text
    • http://porod.venetoreview.com/uploads/1/3/0/8/130814687/gudifiwowir.pdfIn PDF document text
    • http://wilarotu.mexicollextric.com/uploads/1/3/0/7/130775288/70046f8a96f476.pdfIn PDF document text
    • http://revoza.garyantleproductions.com/uploads/1/3/0/7/130739560/6276626.pdfIn PDF document text
    • http://kijav.hoawindemere.com/uploads/1/3/1/3/131398140/fojapojulefu.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/1/0434/0659/0119/files/easy_bachelor_cookbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/9854/6599/files/busetokisidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3087/0173/files/dowukevanoderupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3032/files/empi_select_tens_unit_lead_wires.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/mad_skills_bmx_2_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04121788-f255-4393-98d7-6f7f4fa89668/wujejafepizopek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d257fa-2b4a-4288-8881-8e3d0c629fe0/83232421887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d710e0a-c49b-4a8f-a93b-dc75360ace58/faziwataxewe.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_off00006a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A76 5188 bytes
SHA-256: e147695510d2d0bc0388d3f85ce8f207e8ae7d452dc5fb25dcdfa1ed58886fdb
font_01_sfnt_off00007c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0B 10200 bytes
SHA-256: 3a02d9791b4946dc15aa8627a742111dbb29af61fd65f0905cc99e30c404fbc5

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