Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5363136a86bd919…

MALICIOUS

PDF

47.6 KB Created: 2020-10-09 22:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 59b170ed89a52dcc4a68955f1151dcff SHA-1: 67f214e7cbefc9cbd06800d44d25305f6e8a550f SHA-256: e5363136a86bd919e8f7dec30b8c6bfa7957947d06f831d69005990a86d90f8c
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/strik?keyword=conscientizacao+in+english In PDF document text
    • http://vixonukas.jhcfirestop.com/uploads/1/3/1/4/131406352/f2947dca6.pdfIn PDF document text
    • http://files.carolsglorykitchen.com/uploads/1/3/2/6/132680907/sapewimasavaxoxu.pdfIn PDF document text
    • http://dewiwofa.prestigepropertiesph.com/uploads/1/3/2/6/132695742/50c0d3.pdfIn PDF document text
    • http://files.solucionesksm.com/uploads/1/3/0/8/130873850/d2362b492a34.pdfIn PDF document text
    • http://files.jennileighphotography.net/uploads/1/3/0/8/130873804/0577f5b7f280618.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/1/0435/2075/3823/files/tafewinarevaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7733/6224/files/geometry_proof_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/pepuvupujeworanekakeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6387/2150/files/motevadasilimakapad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7198/1718/files/the_three_jokers_wiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/watch_steven_universe_change_your_mind_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2524/3040/files/sandra_cisneros_my_wicked_wicked_ways.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4781/2248/files/vuvorodosol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/medida_de_pulgada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5491/5488/files/the_carnivorous_carnival_audiobook.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
stream_003_off00007d85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7D85 4920 bytes
SHA-256: dea584a1ab976f1378758a01018b36dc2993d4953b39351c4693296e04eae09e
font_01_sfnt_off00008e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E49 10436 bytes
SHA-256: c2876685f6a14340f360984db0a25f06ea63e140a930b0e743b4c163aceca5a0

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