Malicious PDF — malware analysis report

Static analysis result for SHA-256 db33f87e5331dfa1…

MALICIOUS

PDF

36.3 KB Created: 2020-10-25 19:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: aa88ac7418bc83046371062b6c6c6719 SHA-1: d83b5048cd65d81bc27ad612b88fb13de305f4b5 SHA-256: db33f87e5331dfa1173ed60c983f82a1f64b35d9d5c807b2ef630f494620bb1c
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/pify?keyword=jlg+1350sjp+parts+manual In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/wisubafawuba_tosugetufofumu.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/patuwurituruj_zijejusujukin.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/6d9e7.pdfIn PDF document text
    • https://murudogukezopo.weebly.com/uploads/1/3/4/3/134320821/suzedefoxagu-sinijoridaropog-nonisi-petuvexeje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f87174c406ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8e749db3dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5f8b27aed7733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f8cf4e5ded5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004c6c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004c6c.bin)
    • https://cdn.shopify.com/s/files/1/0480/3366/1077/files/rx-0_unicorn_gundam_perfectibility_divine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2612/8289/files/hp_elitebook_folio_9480m_battery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3655/2601/files/451494650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1192/2856/files/71553790847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1becbf0-9280-4e67-ba40-ce1c65dea320/rutuwojaxejadam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/606d29ed-dad3-4367-b688-c8573cbd130b/mayombe_pepetela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1372/9179/files/lacasa_de_bernarda_alba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1169/7814/files/27638369283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1464/4127/files/pontiac_head_id_codes.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_off00004c6c.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6C 5688 bytes
SHA-256: 57b1b770ad1fdd6b85b7d7662b085d097c0df9b7ff89329a2e09f31cd3fdef20
font_01_sfnt_off00005fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB8 11048 bytes
SHA-256: 3027f810f1e8f71e50a14dd7e2ed11b5834ebbe8bd770f6532a7bed30d71a8c5